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• pfsense peer-to-peer OpenVPN not connecting

  - by John P

  I'm trying to setup a peer-to-peer OpenVPN between two pfsense servers running 2.0.1-RELEASE, but the client keeps getting the connection dropped, with a status of "reconnecting; ping-restart" and nothing appears to be routing between them. Both these firewalls are also doing PPTP VPNs that are working correctly. FW01 ("server") ======================= LAN: 10.1.1.2/24 WAN: xx.xx.126.34/27 ServerMode: Peer to Peer (Shared Key) Protocol: UDP DeviceMode: tun Interface: WAN Port 1194 Tunnel: 10.0.8.1/30 Local Network: 10.1.1.0/24 Remote Network: 192.168.1.0/24 Firewall Rule in OpenVPN tab: UDP * * * * * none FW03 (client) LAN: 192.168.1.2/24 WAN: xx.xx.9.66/27 ServerMode: Peer to Peer (Shared Key) Protocol: UDP DeviceMode: tun Interface: WAN Server Host: xx.xx.126.34 Tunnel: -- also tried 10.1.8.0/24 Remote Network: 10.1.1.0/24 Client Logs: System Log Apr 6 18:00:08 kernel: ... Restarting packages. Apr 6 18:00:13 check_reload_status: Starting packages Apr 6 18:00:19 php: : Restarting/Starting all packages. Apr 6 18:00:56 kernel: ovpnc1: link state changed to DOWN Apr 6 18:00:56 check_reload_status: Reloading filter Apr 6 18:00:57 check_reload_status: Reloading filter Apr 6 18:00:57 kernel: ovpnc1: link state changed to UP Apr 6 18:00:57 check_reload_status: rc.newwanip starting ovpnc1 Apr 6 18:00:57 check_reload_status: Syncing firewall Apr 6 18:01:02 php: : rc.newwanip: Informational is starting ovpnc1. Apr 6 18:01:02 php: : rc.newwanip: on (IP address: ) (interface: ) (real interface: ovpnc1). Apr 6 18:01:02 php: : rc.newwanip: Failed to update IP, restarting... Apr 6 18:01:02 php: : send_event: sent interface reconfigure got ERROR: incomplete command. all reload reconfigure restart newip linkup sync Client OpenVPN log Apr 6 18:39:14 openvpn[12177]: Inactivity timeout (--ping-restart), restarting Apr 6 18:39:14 openvpn[12177]: SIGUSR1[soft,ping-restart] received, process restarting Apr 6 18:39:16 openvpn[12177]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Apr 6 18:39:16 openvpn[12177]: Re-using pre-shared static key Apr 6 18:39:16 openvpn[12177]: Preserving previous TUN/TAP instance: ovpnc1 Apr 6 18:39:16 openvpn[12177]: UDPv4 link local (bound): [AF_INET]64.94.9.66 Apr 6 18:39:16 openvpn[12177]: UDPv4 link remote: [AF_INET]64.74.126.34:1194 Server OpenVPN log Apr 6 14:40:36 openvpn[22117]: UDPv4 link remote: [undef] Apr 6 14:40:36 openvpn[22117]: UDPv4 link local (bound): [AF_INET]xx.xx.126.34:1194 Apr 6 14:40:36 openvpn[21006]: /usr/local/sbin/ovpn-linkup ovpns1 1500 1557 10.1.8.1 10.1.8.2 init Apr 6 14:40:36 openvpn[21006]: /sbin/ifconfig ovpns1 10.1.8.1 10.1.8.2 mtu 1500 netmask 255.255.255.255 up Apr 6 14:40:36 openvpn[21006]: do_ifconfig, tt-ipv6=0, tt-did_ifconfig_ipv6_setup=0 Apr 6 14:40:36 openvpn[21006]: TUN/TAP device /dev/tun1 opened Apr 6 14:40:36 openvpn[21006]: Control Channel Authentication: using '/var/etc/openvpn/server1.tls-auth' as a OpenVPN static key file Apr 6 14:40:36 openvpn[21006]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Apr 6 14:40:36 openvpn[21006]: OpenVPN 2.2.0 amd64-portbld-freebsd8.1 [SSL] [LZO2] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Aug 11 2011 Apr 6 14:40:36 openvpn[17171]: SIGTERM[hard,] received, process exiting Apr 6 14:40:36 openvpn[17171]: /usr/local/sbin/ovpn-linkdown ovpns1 1500 1557 10.1.8.1 10.1.8.2 init Apr 6 14:40:36 openvpn[17171]: ERROR: FreeBSD route delete command failed: external program exited with error status: 1 Apr 6 14:40:36 openvpn[17171]: event_wait : Interrupted system call (code=4) Apr 6 14:06:32 openvpn[17171]: Initialization Sequence Completed Apr 6 14:06:32 openvpn[17171]: UDPv4 link remote: [undef] Apr 6 14:06:32 openvpn[17171]: UDPv4 link local (bound): [AF_INET]xx.xx.126.34:1194

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• Linux Mint Wireless doesn't connect

  - by guisantogui

  I'm having a great problem, I've installed Linux mint debian edition (LMDE), and following this tutorial http://community.linuxmint.com/tutorial/view/161 I did installed the network driver. The available connections appears to me, but when i try to connect to my connection at first time, I got this message: "(4) Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." And the following tries, I got this another message: "(32) Insufficient privileges." I'm accepting ideas. Thanks. EDIT: The last piece of the logs: Oct 5 00:22:38 gsouza-host ntpd[2116]: peers refreshed Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): bringing up device. Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: nl80211: 'nl80211' generic netlink not found Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: Failed to initialize driver 'nl80211' Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: rfkill: WLAN soft blocked Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> WiFi hardware radio set enabled Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> WiFi now enabled by radio killswitch Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): supplicant interface state: starting -> ready Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): supplicant interface state: ready -> inactive Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <warn> Trying to remove a non-existant call id. Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: rfkill: WLAN unblocked Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: Joining mDNS multicast group on interface wlan0.IPv6 with address fe80::7ae4:ff:fe4a:13a9. Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: New relevant interface wlan0.IPv6 for mDNS. Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: Registering new address record for fe80::7ae4:ff:fe4a:13a9 on wlan0.*. Oct 5 00:22:46 gsouza-host ntpd[2116]: Listen normally on 7 wlan0 fe80::7ae4:ff:fe4a:13a9 UDP 123 Oct 5 00:22:46 gsouza-host ntpd[2116]: peers refreshed

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• Access denied to mysql cause by invalid server hostname bind address

  - by Mark

  I cannot login to mysql using the terminal. [root@fst mysql]# mysql -h localhost -u admin -p Enter password: ERROR 1045 (28000): Access denied for user 'admin'@'localhost' (using password: YES) I am sure I have the correct password. The mysql is also running when I check status. The mysql database is also present in the directory /var/lib/mysql/. The host host.myi, host.myd and host.frm are present. By the way this a related to question on my previous problem MySQL server quit without updating PID file . Initially the problem arise when the root directory was full. To be able to login to directadmin and start mysql, I added a soft link of the /var/lib/mysql/ to /home/mysql. Since my database used up the most of the root directory. The root directory has 50Gb and /home has 1.5Gb. Somehow the /var/lib/mysql/idbdata1 is corrupted. So I move it to another location. Now, I can start the mysql server but I cannot login into it. Below are the contents from the myql logs. 121212 20:44:10 mysqld_safe mysqld from pid file /var/lib/mysql/fst.srv.net.pid ended 121212 20:44:10 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 121212 20:44:10 [Note] Plugin 'FEDERATED' is disabled. 121212 20:44:10 InnoDB: The InnoDB memory heap is disabled 121212 20:44:10 InnoDB: Mutexes and rw_locks use GCC atomic builtins 121212 20:44:10 InnoDB: Compressed tables use zlib 1.2.3 121212 20:44:10 InnoDB: Using Linux native AIO 121212 20:44:10 InnoDB: Initializing buffer pool, size = 128.0M 121212 20:44:10 InnoDB: Completed initialization of buffer pool 121212 20:44:10 InnoDB: highest supported file format is Barracuda. 121212 20:44:11 InnoDB: Waiting for the background threads to start 121212 20:44:12 InnoDB: 1.1.8 started; log sequence number 1595675 121212 20:44:12 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306 121212 20:44:12 [Note] - '0.0.0.0' resolves to '0.0.0.0'; 121212 20:44:12 [Note] Server socket created on IP: '0.0.0.0'. 121212 20:44:12 [Note] Event Scheduler: Loaded 0 events 121212 20:44:12 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.27-log' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL) I guess there is something wrong with the bind address. How should I fix the problem?

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• Ubuntu Newbie Needs Assistance!!

  - by Steve Greene

  New Ubuntu User Needs Help!- version 9.10 does not communicate with laptop Hello folks, Several days ago, I installed Ubuntu 9.10 onto my Acer Aspire 3100 laptop, running it alongside Widows Vista as a dual-bootable system. Creation of the Ubuntu boot CD went fine, and the installation onto my hard drive was flawless. Ubuntu opens and behaves as I would expect, except for one little problem. For reasons unknown to me, Ubuntu is not communicating with my laptop's networking hardware, and I have no internet connectivity, even when sitting directly under the wireless router at the local library (literally), which puts out a wickedly-fast signal that my Windows Vista OS auto-detects and immediately connects to. Up in the right side of the Ubuntu desktop, I click on the network icon and it does not show a wireless connection at all, even though I am only a few feet from the router. At home, where I use a dialup modem, I also see no means of getting online. My modem is an HDAUDIO Soft Data Fax Modem with Smart CP,manufactured by CXT (Conexant Systems Inc., file version 4.0.13.0, and the driver version is 7.58.0.0). I desparately wish to convert to Ubuntu. I used Mac for ten years, and then Windows for ten years. Now, after 20 years, I want to live out my days as an open-source Ubuntu fanatic. I am ready to give the old status quo the boot! I am an advanced computer user, but I am not a programmer. I seek a solution that is user-friendly for normal people, something equivalent to a driver that I can easily install or activate that will allow Ubuntu to see my hardware and get me connected. Can anyone help me over this hopefully-little glitch so that I can move on in total Ubuntu bliss? My processor is a Mobile AMD Sempron Processor 3500+ at 1.80 GHz, 1.50 GB RAM, and a 32-bit Operating System. I am running Windows Vista Home Basic, Service Pack 2. My current email is [email protected] if you have a workable solution that does not require programmer status to implement. Surely this must be a simple fix that I simply am overlooking, but being the new guy on the block, I have yet to be enlightened. Thanks for your help in coming up to speed!! Steve Wanna' be Ubuntu Fanatic "If you're not living on the edge, you're taking up too much space."

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• SSSD Authentication

  - by user24089

  I just built a test server running OpenSuSE 12.1 and am trying to learn how configure sssd, but am not sure where to begin to look for why my config cannot allow me to authenticate. server:/etc/sssd # cat sssd.conf [sssd] config_file_version = 2 reconnection_retries = 3 sbus_timeout = 30 services = nss,pam domains = test.local [nss] filter_groups = root filter_users = root reconnection_retries = 3 [pam] reconnection_retries = 3 # Section created by YaST [domain/mose.cc] access_provider = ldap ldap_uri = ldap://server.test.local ldap_search_base = dc=test,dc=local ldap_schema = rfc2307bis id_provider = ldap ldap_user_uuid = entryuuid ldap_group_uuid = entryuuid ldap_id_use_start_tls = True enumerate = False cache_credentials = True chpass_provider = krb5 auth_provider = krb5 krb5_realm = TEST.LOCAL krb5_kdcip = server.test.local server:/etc # cat ldap.conf base dc=test,dc=local bind_policy soft pam_lookup_policy yes pam_password exop nss_initgroups_ignoreusers root,ldap nss_schema rfc2307bis nss_map_attribute uniqueMember member ssl start_tls uri ldap://server.test.local ldap_version 3 pam_filter objectClass=posixAccount server:/etc # cat nsswitch.conf passwd: compat sss group: files sss hosts: files dns networks: files dns services: files protocols: files rpc: files ethers: files netmasks: files netgroup: files publickey: files bootparams: files automount: files ldap aliases: files shadow: compat server:/etc # cat krb5.conf [libdefaults] default_realm = TEST.LOCAL clockskew = 300 [realms] TEST.LOCAL = { kdc = server.test.local admin_server = server.test.local database_module = ldap default_domain = test.local } [logging] kdc = FILE:/var/log/krb5/krb5kdc.log admin_server = FILE:/var/log/krb5/kadmind.log default = SYSLOG:NOTICE:DAEMON [dbmodules] ldap = { db_library = kldap ldap_kerberos_container_dn = cn=krbContainer,dc=test,dc=local ldap_kdc_dn = cn=Administrator,dc=test,dc=local ldap_kadmind_dn = cn=Administrator,dc=test,dc=local ldap_service_password_file = /etc/openldap/ldap-pw ldap_servers = ldaps://server.test.local } [domain_realm] .test.local = TEST.LOCAL [appdefaults] pam = { ticket_lifetime = 1d renew_lifetime = 1d forwardable = true proxiable = false minimum_uid = 1 clockskew = 300 external = sshd use_shmem = sshd } If I log onto the server as root I can su into an ldap user, however if I try to console locally or ssh remotely I am unable to authenticate. getent doesn't show the ldap entries for users, Im not sure if I need to look at LDAP, nsswitch, or what: server:~ # ssh localhost -l test Password: Password: Password: Permission denied (publickey,keyboard-interactive). server:~ # su test test@server:/etc> id uid=1000(test) gid=100(users) groups=100(users) server:~ # tail /var/log/messages Nov 24 09:36:44 server login[14508]: pam_sss(login:auth): system info: [Client not found in Kerberos database] Nov 24 09:36:44 server login[14508]: pam_sss(login:auth): authentication failure; logname=LOGIN uid=0 euid=0 tty=/dev/ttyS1 ruser= rhost= user=test Nov 24 09:36:44 server login[14508]: pam_sss(login:auth): received for user test: 4 (System error) Nov 24 09:36:44 server login[14508]: FAILED LOGIN SESSION FROM /dev/ttyS1 FOR test, System error server:~ # vi /etc/pam.d/common-auth auth required pam_env.so auth sufficient pam_unix2.so auth required pam_sss.so use_first_pass server:~ # vi /etc/pam.d/sshd auth requisite pam_nologin.so auth include common-auth account requisite pam_nologin.so account include common-account password include common-password session required pam_loginuid.so session include common-session session optional pam_lastlog.so silent noupdate showfailed

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• BUILDROOT files during RPM generation

  - by khmarbaise

  Currently i have the following spec file to create a RPM. The spec file is generated by maven plugin to produce a RPM out of it. The question is: will i find files which are mentioned in the spec file after the rpm generation inside the BUILDROOT/SPECS/SOURCES/SRPMS structure? %define _unpackaged_files_terminate_build 0 Name: rpm-1 Version: 1.0 Release: 1 Summary: rpm-1 License: 2009 my org Distribution: My App Vendor: my org URL: www.my.org Group: Application/Collectors Packager: my org Provides: project Requires: /bin/sh Requires: jre >= 1.5 Requires: BASE_PACKAGE PreReq: dependency Obsoletes: project autoprov: yes autoreq: yes BuildRoot: /home/build/.jenkins/jobs/rpm-maven-plugin/workspace/target/it/rpm-1/target/rpm/rpm-1/buildroot %description %install if [ -e $RPM_BUILD_ROOT ]; then mv /home/build/.jenkins/jobs/rpm-maven-plugin/workspace/target/it/rpm-1/target/rpm/rpm-1/tmp-buildroot/* $RPM_BUILD_ROOT else mv /home/build/.jenkins/jobs/rpm-maven-plugin/workspace/target/it/rpm-1/target/rpm/rpm-1/tmp-buildroot $RPM_BUILD_ROOT fi ln -s /usr/myusr/app $RPM_BUILD_ROOT/usr/myusr/app2 ln -s /tmp/myapp/somefile $RPM_BUILD_ROOT/tmp/myapp/somefile2 ln -s name.sh $RPM_BUILD_ROOT/usr/myusr/app/bin/oldname.sh %files %defattr(-,myuser,mygroup,-) %dir "/usr/myusr/app" "/usr/myusr/app2" "/tmp/myapp/somefile" "/tmp/myapp/somefile2" "/usr/myusr/app/lib" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/start.sh" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/filter-version.txt" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/name.sh" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/name-Linux.sh" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/filter.txt" %attr(755,myuser,mygroup) "/usr/myusr/app/bin/oldname.sh" %dir "/usr/myusr/app/conf" %config "/usr/myusr/app/conf/log4j.xml" "/usr/myusr/app/conf/log4j.xml.deliver" %prep echo "hello from prepare" %pre -p /bin/sh #!/bin/sh if [ -s "/etc/init.d/myapp" ] then /etc/init.d/myapp stop rm /etc/init.d/myapp fi %post #!/bin/sh #create soft link script to services directory ln -s /usr/myusr/app/bin/start.sh /etc/init.d/myapp chmod 555 /etc/init.d/myapp %preun #!/bin/sh #the argument being passed in indicates how many versions will exist #during an upgrade, this value will be 1, in which case we do not want to stop #the service since the new version will be running once this script is called #during an uninstall, the value will be 0, in which case we do want to stop #the service and remove the /etc/init.d script. if [ "$1" = "0" ] then if [ -s "/etc/init.d/myapp" ] then /etc/init.d/myapp stop rm /etc/init.d/myapp fi fi; %triggerin -- dependency, dependency1 echo "hello from install" %changelog * Tue May 23 2000 Vincent Danen <[email protected]> 0.27.2-2mdk -update BuildPreReq to include rep-gtk and rep-gtkgnome * Thu May 11 2000 Vincent Danen <[email protected]> 0.27.2-1mdk -0.27.2 * Thu May 11 2000 Vincent Danen <[email protected]> 0.27.1-2mdk -added BuildPreReq -change name from Sawmill to Sawfish The problem i found is that the files (filter.txt in particular) after the generation process on a Ubuntu system but not on SuSE system. Which might be caused by different rpm versions ? Currently we have an integration test which fails based on the non existing of the file (filter.txt under a buildroot folder?)

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• Building NanoBSD inside a jail

  - by ptomli

  I'm trying to setup a jail to enable building a NanoBSD image. It's actually a jail on top of a NanoBSD install. The problem I have is that I'm unable to mount the md device in order to do the 'build image' part. Is it simply not possible to mount an md device inside a jail, or is there some other knob I need to twiddle? On the host /etc/rc.conf.local jail_enable="YES" jail_mount_enable="YES" jail_list="build" jail_set_hostname_allow="NO" jail_build_hostname="build.vm" jail_build_ip="192.168.0.100" jail_build_rootdir="/mnt/zpool0/jails/build/home" jail_build_devfs_enable="YES" jail_build_devfs_ruleset="devfsrules_jail_build" /etc/devfs.rules [devfsrules_jail_build=5] # nothing Inside the jail [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# sysctl security.jail security.jail.param.cpuset.id: 0 security.jail.param.host.hostid: 0 security.jail.param.host.hostuuid: 64 security.jail.param.host.domainname: 256 security.jail.param.host.hostname: 256 security.jail.param.children.max: 0 security.jail.param.children.cur: 0 security.jail.param.enforce_statfs: 0 security.jail.param.securelevel: 0 security.jail.param.path: 1024 security.jail.param.name: 256 security.jail.param.parent: 0 security.jail.param.jid: 0 security.jail.enforce_statfs: 1 security.jail.mount_allowed: 1 security.jail.chflags_allowed: 1 security.jail.allow_raw_sockets: 0 security.jail.sysvipc_allowed: 0 security.jail.socket_unixiproute_only: 1 security.jail.set_hostname_allowed: 0 security.jail.jail_max_af_ips: 255 security.jail.jailed: 1 [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# mdconfig -l md2 md0 md1 md0 and md1 are the ramdisks of the host. bsdlabel looks sensible [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# bsdlabel /dev/md2s1 # /dev/md2s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 1012016 16 4.2BSD 0 0 0 c: 1012032 0 unused 0 0 # "raw" part, don't edit newfs runs ok [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# newfs -U /dev/md2s1a /dev/md2s1a: 494.1MB (1012016 sectors) block size 16384, fragment size 2048 using 4 cylinder groups of 123.55MB, 7907 blks, 15872 inodes. with soft updates super-block backups (for fsck -b #) at: 160, 253184, 506208, 759232 mount fails [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# mount /dev/md2s1a _.mnt/ mount: /dev/md2s1a : Operation not permitted UPDATE: One of my colleagues pointed out There are some file systems types that can't be securely mounted within a jail no matter what, like UFS, MSDOFS, EXTFS, XFS, REISERFS, NTFS, etc. because the user mounting it has access to raw storage and can corrupt it in a way that it will panic entire system. From http://www.mail-archive.com/[email protected]/msg160389.html So it seems that the standard nanobsd.sh won't run inside a jail while it uses the md device to build the image. One potential solution I'll try is to chroot from the host into the build jail, rather than jexec a shell.

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• Why many applications close after opening a document or doing a specific actions?

  - by Mohsen Farjami

  I have some encrypted pdf files that have no problem and in my last windows, I could open them easily with Adobe Reader 9.2 and other pdf readers. But now, I can only open non-encrypted pdf files and one encrypted file with Adobe Reader. every time I open almost any encrypted pdf, it closes itself. Also, when I try to search a folder for a keyword with Foxit Reader, once it closed. This is not related to Adobe Reader, because I have the same problem with Word 2007. When I open a document, sometimes it closes instantly and sometimes it closes after a few seconds and sometimes it is stable. My windows is Fresh. I have installed it a few days ago. I have ESET Smart Security 5.2 and I have updated it today. OS: XP Pro SP3, RAM: 3 GB, CPU: 2 GHZ, HDD: 320 GB My installed applications: Adobe AIR Adobe Flash Player 11 ActiveX Adobe Flash Player 11 Plugin Adobe Photoshop CS4 Adobe Reader 9.2 Atheros Wireless LAN Client Adapter Babylon Bluetooth Stack for Windows by Toshiba CCleaner Conexant HD Audio Dell Touchpad ESET Smart Security Farsi (101) Custom Foxit Reader Framing Studio 3.27 Google Chrome Hard Disk Sentinel PRO HDAUDIO Soft Data Fax Modem with SmartCP Intel(R) Graphics Media Accelerator Driver IrfanView (remove only) Java(TM) 6 Update 18 K-Lite Mega Codec Pack 8.8.0 Microsoft .NET Framework 2.0 Service Pack 1 Microsoft .NET Framework 3.0 Service Pack 1 Microsoft .NET Framework 3.5 Microsoft Data Access Components KB870669 Microsoft Office 2007 Primary Interop Assemblies Microsoft Office Enterprise 2007 Microsoft User-Mode Driver Framework Feature Pack 1.0.0 (Pre-Release 5348) Mozilla Firefox 7.0.1 (x86 en-US) Notepad++ Office Tab FreeEdition 8.50 ParsQuran PerfectDisk 12 Professional Registry First Aid RICOH R5C83x/84x Flash Media Controller Driver Ver.3.54.06 Sahar Money Manager 2.5 Stickies 7.1d The KMPlayer (remove only) TurboLaunch 5.1.2 Unlocker 1.9.1 USB Safely Remove 4.2 Virastyar Visual Studio 2005 Tools for Office Second Edition Runtime Winamp Windows Internet Explorer 8 Windows Media Player 11.0.5358.4826 Windows XP Service Pack 3 WinRAR 4.11 (32-bit) WorkPause 1.2 Z Dictionary My startup applications: WorkPause USB Safely Remove TurboLaunch SunJavaUpdateSched Stickies rfagent Persistence ParsQuran Daily Verse ITSecMng IgfxTray HotKeysCmds Hard Disk Sentinel egui disable shift+delete CTFMON.EXE Bluetooth Manager Babylon Client Apoint AdobeCS4ServiceManager Adobe Reader Speed Launcher Adobe ARM What should I do to solve it? If you recommend installing Windows again, what guarantees that it won't happen again?

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• Why does writing a file to an NFS share send a COMMIT operation to the NFS server?

  - by Antonis Christofides

  I have a Debian squeeze (2.6.32-5-amd64) which is at the same time a NFS4 server and client (it mounts itself through NFS4). The local directory that leads directly to disk is /nfs4exports/mydir, whereas /nfs4mounts/mydir is the same thing mounted through NFS, using the machine's external IP address. Here is the line from fstab: 192.168.1.75:/mydir /nfs4mounts/mydir nfs4 soft 0 0 I have an application that writes many small files. If I write directly to /nfs4exports/mydir, it writes thousands of files per second; but if I write to /nfs4mounts/mydir, it writes 4 files per second or so. I can greatly increase speed if I add async to /etc/exports. (Writing a single large file to the NFS-mounted directory goes at more than 100 MB/s.) I examine the server statistics and I see that whenever a file is written, it is "committed" (this also happens with NFSv3): root@debianvboxtest:~# mount -t nfs4 192.168.1.75:/mydir /mnt root@debianvboxtest:~# nfsstat|grep -A 2 'nfs v4 operations' Server nfs v4 operations: op0-unused op1-unused op2-future access close commit 0 0% 0 0% 0 0% 10 4% 1 0% 1 0% root@debianvboxtest:~# echo 'hello' >/mnt/test1056 root@debianvboxtest:~# nfsstat|grep -A 2 'nfs v4 operations' Server nfs v4 operations: op0-unused op1-unused op2-future access close commit 0 0% 0 0% 0 0% 11 4% 2 0% 2 0% Now in the RFC, I read this: The COMMIT operation is similar in operation and semantics to the POSIX fsync(2) system call that synchronizes a file's state with the disk (file data and metadata is flushed to disk or stable storage). COMMIT performs the same operation for a client, flushing any unsynchronized data and metadata on the server to the server's disk or stable storage for the specified file. I don't understand why the client commits. I don't think that the "echo" shell built-in command runs fsync; if echo wrote to a local file and then the machine went down, the file might be lost. In contrast, the NFS client appears to be sending a COMMIT upon completion of the echo. Why? I am reluctant to use the async NFS server option, because it would apparently ignore COMMIT. I feel as if I had a local filesystem and I had to choose between syncing every file upon close and ignoring fsync altogether. What have I understood wrong?

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• Can't validate mine, sudo nor root in Debian "Jessie" Gnome anymore?

  - by Janar

  I'm Debian beginner & GUI guy in a bit of trouble? Can't login as sudo/gksu/root/su nor as (main/super)user after removed user password via Gnome-user-settings. History of actions (Probably irrelevant though) Installed Debian "Jessie" GNU/Linux with xFce GUI (en-US) as only OS. HardWare is ThinkPad w510. Skipped root user password in setup, to get sudo for superuser easily. Logged in (as always had) with Gnome (3.4.x), not once with xFCE. (installed Xfce. Installed xFce only to achieve more control (easier management) over packages this way, to set-up gnome much more by mine likes. Added more jessie repros (same ones as in Wheesy stable by default but for Jessie as, Jessie only had repros for security updates by default). Installed lots of gtk(3) & gnome(3) based soft; (- restarted again after this) Installed propietary graphics card driver for mine nvidia quadro. (- restarted once again after that one) Installed more stuff related to mine work/school/devel. The actual problem Had a plan to restart again, but wanted to set up auto-login first, instead set user password to none (don't ask why / perhaps caused by being awake for a looooong time), noticed it, and set also to auto-login, but couldn't undo mine previous mistake to create new password for me. As mine password is set to none I would have expected that simply return in pass prompt for emty password field would do, but it won't authenticate. I tried Alt+F2 "gksu gedit" as well as: sudo wget "https://www.some-page.eu/file.ext" and "su" in terminals, none has applied (quite logical actually - as I'm sudoer and highest ranked super user, besides only user in computer). Current stand Everything worked & still works nice after this accident, besides this password prompts part. To spoked to log-out nor restart. Synaptic package-manager is still open with root rights (only one, that has left open prior to the issue and not closed since, just in case). Goggled for help and read some manuals/faqs/how-tos - mostly lead to sudoers file management, but not found one specifically for mine issue - so still not any smarter. Really hope, that I don't have to redo OS inst all over again, by just one stupid mistake. Thanks for your reply :-)

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• Partition/install issues

  - by jalal ahmad

  I am new to Ubuntu and tried to install 10.1 as dual boot option from a USB. At first I encountered the error when in partition dialogue of installation process that cannot find root directory. I did a search on Ubuntu forums and did this as in one of the posts. Make sure that the partition file system you wish to install Linux, Ubuntu or Backtrack on it is ext4, ext3 or ext2, and not FAT32 or NTFS. Then mount / on it: During the installation process press "change" on the partition you wish to use Make sure "do not use this partition" scroll is not chosen, scroll to ext4, ext3 or ext2 On the "mount" field write / Click ok, then next a message will appear saying something like "swap area was not defined, do you wish to continue or choose a swap area?", click "ok" and continue or click "go back" and choose another partition and click change, on the file system scroll choose "swap" and click "ok" and next All good but when I rebooted I could not find Windows vista as in dual boot option. Plus I could not see wireless networks and in the process of trying to find out what went wrong the soft switch somehow turned off and as I cannot boot in Windows I have no idea what to do. Again searching internet I found a post which said the dual boot problem can be overcome by installing gparted but when I tried I got the message Reading package lists... Done Building dependency tree Reading state information.. Done E: Couldn't find package gparted I thought I am going to copy my stuff from my hard disk and try to install Windows but I found out that I have two partitions which are different from what I had before installing Ubuntu. I now have filesystem partition1 119 GB ext4, swap partition 5 1.1 GB swap and extended partition 2 1.1 GB. And I cannot mount 119 GB where all my personal videos, photos are if still there. Now I cannot boot from Windows even. Need help on what to do? Best case scenario would be to be able to copy my stuff before I mess up the system further. Else a dual boot system and if not then how do I install vista again. I have Windows CD. Cheers guys and thanks in advance.

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• Recover strategy single bad sector in moricon

  - by Damon

  This week, my harddisk made me an early christmas present in the form of a single defect sector. To make up for the puny size of the present, it chose a sector inside moricons.dll for that. This means that now the system takes about 5 minutes to boot before Windows gives up and moves on, and there's 2 dozen scary "critical failure" entries in the system log after every boot, which is annoying. OK, admittedly, I shouldn't complain, it could be worse, the bad sector could be in ntldr... SMART info more or less indicates (for what SMART can indicate anyway) that the drive is mostly OK. Soft Read Error Rate has a score of 96, and Current Pending Sector Count has a raw value of 8, which translates to a score of 100. Acronis DriveMonitor makes this an issue (lowering the overall rating to 75%), HDD Health calls it "excellent", giving an overall rating of 95% (which is what this harddisk from day one). No single score is below 95 (power on hours and spin up count), and most are 100 anyway. Well, whatever, I've seen drives with perfect SMART values fail from one second to the other, and drives with moderate values work for years. So, I'm inclined not to put too much weight into that overall. TL;DR Now... to the problem: I don't feel like trashing the disk just yet (that's planned with a new OS install upgrading to Win7 early next year, independently of this issue), but in the mean time, I would still like to have a smoothly running system again. Therefore, I feel tempted to tamper with it, but before I render my system entirely unusable (since I've never done this before), I'd like to verify that my planned procedere is likely to suceed in having a working system again: Copy moricons.dl_ from the Windows install disk, rename it to moricons.zip, and unzip it. This gives an intact 5.1.2600.2180 version (the broken one is 5.1.2600.5512 - but I guess this makes not much of a difference, since it's an icon-only DLL, and an outdated copy should work better than one that can't be read) Run chkdsk /r /f` which will "repair" the file (i.e. delete the file without asking, tell the drive to remap the sector, and toss some unreadable junk into a file with a hexadecimal number) Hopefully Windows still boots after this (is that a reasonable expectation, or do I need to have something like BartPE ready? -- but then again, what's that good for in case chkdsk has nuked the entire file system...) Delete the junk file generated by chkdsk, copy the new DLL to %windir%\system32 Reboot. Pray. Maybe I just shouldn't touch anything, since it still kind of works... if annoying, but it works. Unsure... But, is there anything fundamentally wrong with the planned approach? Is this a sensible approach at all?

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• RDP exits immediately after connecting to Windows Server 2008 R2

  - by carpat

  Background: I recently got a Windows cloud VPS server. I don't have much experience with server admin (I'm a programmer), and what little I do have is with linux servers. Ever since getting the server I've been having issues with RDP. I can connect about two or three times, after which point I can't connect until one of the tech guys "fixes" it (see below). When I connect, I can stay connected for hours with no problem. When the problem connecting starts, the first time I try to log in, the remote desktop window pops up, starts connecting, and then exits with "Your Remote Desktop session has ended". After that, for about 10-20 minutes if I try to connect again, the connections times out with Remote Desktop can't connect to the computer for one of these reasons: 1) Remote access on the server is not enabled 2) The remote computer is turned off 3) The remote computer is not available on the network then goes back to connecting once and immediately disconnecting. All of the updates are installed. The firewall has been correctly configured to let RDP traffic through. The remote setting is "Allow connections from computers running any version of Remote Desktop". I tried creating a second user, and when I can't connect, I can't connect to that user either. I've tried both soft and hard reboots, neither of which help. I've tried connecting from two different computers (both running Windows 7) from two different networks (work and home), and the behavior is the same. Everything else on the server continues to run fine (IIS-served http pages, Tomcat-served java pages, svn, ping). The "fix" that the tech guys supply is simply logging into the console on their end, after which point I can connnect 2 or 3 times again. The event viewer on the server has "authentication failure" (or something similar) events generated when I attempt to log in and can't. I can't get to the actual event at the moment as I'm currently in the can't connect stage, and waiting for the techs to log in. But when I searched for the event earlier this morning I couldn't find anything useful. Can anyone help?

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• Repair corrupt hard disk on Mac without install CD

  - by Sarah

  The hard disk of my late 2009 MacBook Pro appears to have become corrupted. I am traveling and do not have my install CD (and won't for several weeks, nor will I be anywhere near an Apple store). The hard disk is not the original, which failed in June 2011. It's some Hitachi replacement installed by IT. History: I was typing an email this afternoon, my computer suddenly started making soft clicking sounds and then froze. I was not moving around. I rebooted, which took a while. I heard more clicking sounds and the computer froze at least once again. It's now kind of working, with mdworker sucking up one CPU. There are no awkward hard drive sounds when I run Chrome or play music. However, when I launched Stickies, I found no trace of my saved Stickies. I ran a live disk verification from within Disk Utility, and it reported Problem: As reported, I don't have access to an installation disc and am nowhere near an area where I can get one for at least two weeks. I have the option of asking someone to go to some trouble and expense to get one for me, but I'm not sure it's worth it: I've read that I can use fsck from single-user mode to repair the disk. Should I just try this? Is it risky? I'm concerned that the clicky sound portends imminent (mechanical) hard drive failure, so it's not worth doing a silly repair. This hard disk is backed up, but I definitely won't be able to access the backup while traveling. I'd like to maximize the probability that I can keep using my computer (and all its current files) while traveling. Update I bit the bullet and ran fsck -fy from single-user mode. It only needed one pass (modification) to reach the "okay" stage. However, rebooting took nearly 5 min and involved several rounds of scratchy sounds and a few bad clicks. I'm now back to kind of using my computer (the same files are missing as before). When I ran live disk verification from Disk Utility this time, however, it reported that the volume appears to be OK. Am I right to infer from the scratchy sounds, however, that my hard drive is still rapidly on its way out? Is there anything else I can do to increase its functionality over the next few weeks?

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• Getting 403 on apache with php on fedora 17

  - by Js Lim

  I put the projects on ~/public_html/project and create a soft-link in /var/www/html/project which point to ~/public_html/project. my /etc/httpd/conf/httpd.conf is shown below ServerRoot "/etc/httpd" PidFile run/httpd.pid Timeout 60 KeepAlive Off MaxKeepAliveRequests 100 KeepAliveTimeout 5 <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 4000 </IfModule> <IfModule worker.c> StartServers 4 MaxClients 300 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> Listen 80 Include conf.d/*.conf User apache Group apache ServerAdmin root@localhost UseCanonicalName Off DocumentRoot "/var/www/html" <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory "/var/www/html"> Options Indexes FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> # Allow SVN access from public <Directory "/var/www/svn"> Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory> <IfModule mod_userdir.c> UserDir disabled # UserDir public_html </IfModule> DirectoryIndex index.html index.html.var AccessFileName .htaccess <FilesMatch "^\.ht"> Order allow,deny Deny from all Satisfy All </FilesMatch> TypesConfig /etc/mime.types DefaultType text/plain <IfModule mod_mime_magic.c> # MIMEMagicFile /usr/share/magic.mime MIMEMagicFile conf/magic </IfModule> HostnameLookups Off <IfModule mod_dav_fs.c> # Location of the WebDAV lock database. DAVLockDB /var/lib/dav/lockdb </IfModule> ScriptAlias /cgi-bin/ "/var/www/cgi-bin/" <Directory "/var/www/cgi-bin"> AllowOverride None Options None Order allow,deny Allow from all </Directory> in /var/log/httpd/error_log [error] [client 127.0.0.1] Symbolic link not allowed or link target not accessible: /var/www/html/project [error] [client 127.0.0.1] File does not exist: /var/www/html/favicon.ico in browser Forbidden You don't have permission to access /project on this server. I get this error. ls -l result: drwxrwxrwx 3 js js 4.0K Nov 1 14:43 public_html/ for project drwxr-xr-x. 6 js js 4.0K Nov 1 16:38 public_html/project/ I cannot figure out the problem.

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• Creating an Objective-C++ Static Library in Xcode

  - by helixed

  So I've developed an engine for the iPhone with which I'd like to build a couple different games. Rather than copy and paste the files for the engine inside of each game's project directory, I'd a way to link to the engine from each game, so if I need to make a change to it I only have to do so once. After reeding around a little bit, it seems like static libraries are the best way to do this on the iPhone. I created a new project called Skeleton and copied all of my engine files over to it. I used this guide to create a static library, and I imported the library into a project called Chooser. However, when I tried to compile the project, Xcode started complaining about some C++ data structures I included in a file called ControlScene.mm. Here's my build errors: "operator delete(void*)", referenced from: -[ControlScene dealloc] in libSkeleton.a(ControlScene.o) -[ControlScene init] in libSkeleton.a(ControlScene.o) __gnu_cxx::new_allocator<operation_t>::deallocate(operation_t*, unsigned long)in libSkeleton.a(ControlScene.o) __gnu_cxx::new_allocator<operation_t*>::deallocate(operation_t**, unsigned long)in libSkeleton.a(ControlScene.o) "operator new(unsigned long)", referenced from: -[ControlScene init] in libSkeleton.a(ControlScene.o) __gnu_cxx::new_allocator<operation_t*>::allocate(unsigned long, void const*)in libSkeleton.a(ControlScene.o) __gnu_cxx::new_allocator<operation_t>::allocate(unsigned long, void const*)in libSkeleton.a(ControlScene.o) "std::__throw_bad_alloc()", referenced from: __gnu_cxx::new_allocator<operation_t*>::allocate(unsigned long, void const*)in libSkeleton.a(ControlScene.o) __gnu_cxx::new_allocator<operation_t>::allocate(unsigned long, void const*)in libSkeleton.a(ControlScene.o) "___cxa_rethrow", referenced from: std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_create_nodes(operation_t**, operation_t**)in libSkeleton.a(ControlScene.o) std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_initialize_map(unsigned long)in libSkeleton.a(ControlScene.o) "___cxa_end_catch", referenced from: std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_create_nodes(operation_t**, operation_t**)in libSkeleton.a(ControlScene.o) std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_initialize_map(unsigned long)in libSkeleton.a(ControlScene.o) "___gxx_personality_v0", referenced from: ___gxx_personality_v0$non_lazy_ptr in libSkeleton.a(ControlScene.o) ___gxx_personality_v0$non_lazy_ptr in libSkeleton.a(MenuLayer.o) "___cxa_begin_catch", referenced from: std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_create_nodes(operation_t**, operation_t**)in libSkeleton.a(ControlScene.o) std::_Deque_base<operation_t, std::allocator<operation_t> >::_M_initialize_map(unsigned long)in libSkeleton.a(ControlScene.o) ld: symbol(s) not found collect2: ld returned 1 exit status If anybody could offer some insight as to why these problems are occuring, I'd appreciate it. Thanks, helixed

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• Unity and Object Creation

  - by William

  I am using unity as my IoC container. I am trying to implement a type of IProviderRepository. The concrete implementation has a constructor that accepts a type of IRepository. When I remove the constructor parameter from the concrete implementation everything works fine. I am sure the container is wired correctly. When I try to create the concrete object with the constructor I receive the following error: "The current build operation (build key Build Key[EMRGen.Infrastructure.Data.IRepository1[EMRGen.Model.Provider.Provider], null]) failed: The current type, EMRGen.Infrastructure.Data.IRepository1[EMRGen.Model.Provider.Provider], is an interface and cannot be constructed. Are you missing a type mapping? (Strategy type BuildPlanStrategy, index 3)". Is it possible to achieve the above mention functionality with Unity? Namely have Unity infer a concrete type from the Interface and also inject the constructor of the concrete type with the appropriate concrete object based on constructor parameters. Below is sample of my types defined in Unity and a skeleton class listing for what I want to achieve. IProviderRepository is implemented by ProviderRepository which has a constructor that expects a type of IRepository. <typeAlias alias="ProviderRepositoryInterface" type="EMRGen.Model.Provider.IProviderRepository, EMRGen.Model" /> <typeAlias alias="ProviderRepositoryConcrete" type="EMRGen.Infrastructure.Repositories.Providers.ProviderRepository, EMRGen.Infrastructure.Repositories" /> <typeAlias alias="ProviderGenericRepositoryInterface" type="EMRGen.Infrastructure.Data.IRepository`1[[EMRGen.Model.Provider.IProvider, EMRGen.Model]], EMRGen.Infrastructure" /> <typeAlias alias="ProviderGenericRepositoryConcrete" type="EMRGen.Infrastructure.Repositories.EntityFramework.ApplicationRepository`1[[EMRGen.Model.Provider.Provider, EMRGen.Model]], EMRGen.Infrastructure.Repositories" /> <!-- Provider Mapping--> <typeAlias alias="ProviderInterface" type="EMRGen.Model.Provider.IProvider, EMRGen.Model" /> <typeAlias alias="ProviderConcrete" type="EMRGen.Model.Provider.Doctor, EMRGen.Model" /> //Illustrate the call being made inside my class public class PrescriptionService { PrescriptionService() { IUnityContainer uc = UnitySingleton.Instance.Container; UnityServiceLocator unityServiceLocator = new UnityServiceLocator(uc); ServiceLocator.SetLocatorProvider(() => unityServiceLocator); IProviderRepository pRepository = ServiceLocator.Current.GetInstance<IProviderRepository>(); } } public class GenericRepository<IProvider> : IRepository<IProvider> { } public class ProviderRepository : IProviderRepository { private IRepository<IProvider> _genericProviderRepository; //Explict public default constructor public ProviderRepository(IRepository<IProvider> genericProviderRepository) { _genericProviderRepository = genericProviderRepository; } }

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• Toolbar items in sub-nib

  - by roe

  This question has probably been asked before, but my google-fu must be inferior to everybody else's, cause I can't figure this out. I'm playing around with the iPhone SDK, and I'm building a concept app I've been thinking about. If we have a look at the skeleton generated with a navigation based app, the MainWindow.xib contains a navigation controller, and within that a root-view controller (and a navigation bar and toolbar if you play around with it a little). The root-view controller has the RootViewController-nib associated with it, which loads the table-view. So far so good. To add content to the tool bar and to the navigation bar, I'm supposed to add those to in the hierarchy below the Root View Controller (which works, no problem). However, what I can't figure out is, this is all still within the MainWindow.xib (or, at runtime, nib). How would I define a xib in order for it to pick up tool bar items from that? I want to do (the equivalent of, just reusing the name here) RootViewController *controller = [[RootViewController alloc] initWithNibName:nil bundle:nil]; [self.navigationController pushViewController:controller animated:YES]; [controller release]; and have the navigation controller pick-up on the tool bar items defined in that nib. The logical place to put it would be in the hierarchy under File's Owner (which is of type RootViewController), but it doesn't appear to be possible. Currently, I'm assigning these (navigationItem and toolbarItems) manually in the viewDidLoad method, or define them in the MainWindow.xib directly to be loaded when the app initializes. Any ideas? Edit I guess I'll try to explain with a picture. This is the Interface Builder of the main window, pretty much as it comes out of the wizard to create a navigation based project. I've added a toolbar item for clarity though. You can see the navigation controller, with a toolbar and a navigation bar, and the root view controller. Basically, the Root View Controller has a bar button item and a navigation item as you can see. The thing is, it's also got a nib associated with it, which, when loaded will instantiate a view, and assign it to the view outlet of the controller (which in that nib is File's Owner, of type RootViewController, as should be). How can I get the toolbar item, and the navigation item, into the other nib, the RootViewController.nib so I can remove them here. The RootViewController.nib adds everything else to the Root View Controller, why not these items? The background for this is that I want to simply instantiate RootViewController, initialize it with its own nib (i.e. initWithNibName:nil shown above), and push it onto the navigation controller, without having to add the navigation/toolbar items in coding (as I do it now).

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• What's a clean way to break up a DataTable into chunks of a fixed size with Linq?

  - by Michael Haren

  Update: Here's a similar question Suppose I have a DataTable with a few thousand DataRows in it. I'd like to break up the table into chunks of smaller rows for processing. I thought C#3's improved ability to work with data might help. This is the skeleton I have so far: DataTable Table = GetTonsOfData(); // Chunks should be any IEnumerable<Chunk> type var Chunks = ChunkifyTableIntoSmallerChunksSomehow; // ** help here! ** foreach(var Chunk in Chunks) { // Chunk should be any IEnumerable<DataRow> type ProcessChunk(Chunk); } Any suggestions on what should replace ChunkifyTableIntoSmallerChunksSomehow? I'm really interested in how someone would do this with access C#3 tools. If attempting to apply these tools is inappropriate, please explain! Update 3 (revised chunking as I really want tables, not ienumerables; going with an extension method--thanks Jacob): Final implementation: Extension method to handle the chunking: public static class HarenExtensions { public static IEnumerable<DataTable> Chunkify(this DataTable table, int chunkSize) { for (int i = 0; i < table.Rows.Count; i += chunkSize) { DataTable Chunk = table.Clone(); foreach (DataRow Row in table.Select().Skip(i).Take(chunkSize)) { Chunk.ImportRow(Row); } yield return Chunk; } } } Example consumer of that extension method, with sample output from an ad hoc test: class Program { static void Main(string[] args) { DataTable Table = GetTonsOfData(); foreach (DataTable Chunk in Table.Chunkify(100)) { Console.WriteLine("{0} - {1}", Chunk.Rows[0][0], Chunk.Rows[Chunk.Rows.Count - 1][0]); } Console.ReadLine(); } static DataTable GetTonsOfData() { DataTable Table = new DataTable(); Table.Columns.Add(new DataColumn()); for (int i = 0; i < 1000; i++) { DataRow Row = Table.NewRow(); Row[0] = i; Table.Rows.Add(Row); } return Table; } }

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• .NET Windows Service with timer stops responding

  - by Biri

  I have a windows service written in c#. It has a timer inside, which fires some functions on a regular basis. So the skeleton of my service: public partial class ArchiveService : ServiceBase { Timer tickTack; int interval = 10; ... protected override void OnStart(string[] args) { tickTack = new Timer(1000 * interval); tickTack.Elapsed += new ElapsedEventHandler(tickTack_Elapsed); tickTack.Start(); } protected override void OnStop() { tickTack.Stop(); } private void tickTack_Elapsed(object sender, ElapsedEventArgs e) { ... } } It works for some time (like 10-15 days) then it stops. I mean the service shows as running, but it does not do anything. I make some logging and the problem can be the timer, because after the interval it does not call the tickTack_Elapsed function. I was thinking about rewrite it without a timer, using an endless loop, which stops the processing for the amount of time I set up. This is also not an elegant solution and I think it can have some side effects regarding memory. The Timer is used from the System.Timers namespace, the environment is Windows 2003. I used this approach in two different services on different servers, but both is producing this behavior (this is why I thought that it is somehow connected to my code or the framework itself). Does somebody experienced this behavior? What can be wrong? Edit: I edited both services. One got a nice try-catch everywhere and more logging. The second got a timer-recreation on a regular basis. None of them stopped since them, so if this situation remains for another week, I will close this question. Thank you for everyone so far. Edit: I close this question because nothing happened. I mean I made some changes, but those changes are not really relevant in this matter and both services are running without any problem since then. Please mark it as "Closed for not relevant anymore".

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• Can first descendent be selected directly?

  - by Ben Huh

  I am currently using find() and first() method to select the first descendent element from each of the <div> elements that contains the parent class. But I find this quite cumbersome since find() method would produce a set of matched elements before the first element is being picked. The following is the skeleton of my code: HTML <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=non-parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> <div class=parent> <ul> <li>random characters</li> <li>random characters</li> <li>random characters</li> <li>random characters</li> </ul> </div> // .....the list continues Javascript $('.parent').each(function() { $(this).find('ul li').first().css('color', 'red'); // do other stuff within each loop }); I have seen people using $(".parent li:first") selector. But, because I am doing it in a loop, I am not sure how or whether if this could be done and would like some advice. Thanks.

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• Building the Elusive Windows Phone Panorama Control

  When the Windows Phone 7 Developer SDK was released a couple of weeks ago at MIX10 many people noticed the SDK doesnt include a template for a Panorama control.   Here at Clarity we decided to build our own Panorama control for use in some of our prototypes and I figured I would share what we came up with. There have been a couple of implementations of the Panorama control making their way through the interwebs, but I didnt think any of them really nailed the experience that is shown in the simulation videos.   One of the key design principals in the UX Guide for Windows Phone 7 is the use of motion.  The WP7 OS is fairly stripped of extraneous design elements and makes heavy use of typography and motion to give users the necessary visual cues.  Subtle animations and wide layouts help give the user a sense of fluidity and consistency across the phone experience.  When building the panorama control I was fairly meticulous in recreating the motion as shown in the videos.  The effect that is shown in the application hubs of the phone is known as a Parallax Scrolling effect.  This this pseudo-3D technique has been around in the computer graphics world for quite some time. In essence, the background images move slower than foreground images, creating an illusion of depth in 2D.  Here is an example of the traditional use: http://www.mauriciostudio.com/.  One of the animation gems I've learned while building interactive software is the follow animation.  The premise is straightforward: instead of translating content 1:1 with the interaction point, let the content catch up to the mouse or finger.  The difference is subtle, but the impact on the smoothness of the interaction is huge.  That said, it became the foundation of how I achieved the effect shown below.   Source Code Available HERE Before I briefly describe the approach I took in creating this control..and Ill add some **asterisks ** to the code below as my coding skills arent up to snuff with the rest of my colleagues.  This code is meant to be an interpretation of the WP7 panorama control and is not intended to be used in a production application.  1.  Layout the XAML The UI consists of three main components :  The background image, the Title, and the Content.  You can imagine each  these UI Elements existing on their own plane with a corresponding Translate Transform to create the Parallax effect.  2.  Storyboards + Procedural Animations = Sexy As I mentioned above, creating a fluid experience was at the top of my priorities while building this control.  To recreate the smooth scroll effect shown in the video we need to add some place holder storyboards that we can manipulate in code to simulate the inertia and snapping.  Using the easing functions built into Silverlight helps create a very pleasant interaction.    3.  Handle the Manipulation Events With Silverlight 3 we have some new touch event handlers.  The new Manipulation events makes handling the interactivity pretty straight forward.  There are two event handlers that need to be hooked up to enable the dragging and motion effects: the ManipulationDelta event :  (the most relevant code is highlighted in pink) Here we are doing some simple math with the Manipulation Deltas and setting the TO values of the animations appropriately. Modifying the storyboards dynamically in code helps to create a natural feel.something that cant easily be done with storyboards alone.   And secondly, the ManipulationCompleted event:  Here we take the Final Velocities from the Manipulation Completed Event and apply them to the Storyboards to create the snapping and scrolling effects.  Most of this code is determining what the next position of the viewport will be.  The interesting part (shown in pink) is determining the duration of the animation based on the calculated velocity of the flick gesture.  By using velocity as a variable in determining the duration of the animation we can produce a slow animation for a soft flick and a fast animation for a strong flick. Challenges to the Reader There are a couple of things I didnt have time to implement into this control.  And I would love to see other WPF/Silverlight approaches.  1.  A good mechanism for deciphering when the user is manipulating the content within the panorama control and the panorama itself.   In other words, being able to accurately determine what is a flick and what is click. 2.  Dynamically Sizing the panorama control based on the width of its content.  Right now each control panel is 400px, ideally the Panel items would be measured and then panorama control would update its size accordingly.  3.  Background and content wrapping.  The WP7 UX guidelines specify that the content and background should wrap at the end of the list.  In my code I restrict the drag at the ends of the list (like the iPhone).  It would be interesting to see how this would effect the scroll experience.     Well, Its been fun building this control and if you use it Id love to know what you think.  You can download the Source HERE or from the Expression Gallery  Erik Klimczak  | [email protected] | twitter.com/eklimczDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Nerdstock 2012: A photo review of Microsoft TechEd North America 2012

  - by The Un-T Guy

  Not only could I not fathom that I would ever be attending a tech event of the magnitude of TechEd, neither could any of my co-workers.  As the least technical person in the history of Information Technology ever, I felt as though I were walking into the belly of the beast, fearing I’d not be allowed out until I could write SSIS packages, program in Visual Basic, or at least arm wrestle a DBA.  Most of my fears were unrealized.   But I made it.  I was here.  I even got to wear the Mark of the Geek neck package with schedule, eyeglass cleaners, name badge (company name obfuscated so they don’t fire me), and a pen.  The name  badge was seemingly the key element, as every vendor in the place wanted to scan it to capture name, email address, and numbers to show their bosses back home.  It also let me eat the food and drink the coffee so that’s a fair trade.   A recurring theme throughout the presentations and vendor demos was “the Cloud” and BYOD (bring your own device).  The below was a common site throughout the week, as attendees from all over the world brought their own devices and were able to (seemingly) seamlessly connect to the Worldwide Innerwebs.  Apparently proof that Microsoft and the event organizers were practicing what they were preaching.   “Cavernous” is one way to describe the downstairs facility itself.  “Freaking cavernous” might be more accurate.  Work sessions were held in classrooms on the second and third floors but the real action was happening downstairs.  Microsoft bookstore, blogger hub (shoutout to Geekswithblogs.net), The Wall (sans Pink Floyd, sadly), couches, recharging stations…   …a game zone with pool and air hockey tables, pinball machines, foosball…   …vintage video games…           …and a even giant chess board.  Looked like this guy was opening with the Kaspersky parry.   The blend of technology and fantasy even went so far as to bring childhood favorites to life.  Assuming, of course, your childhood was pre-video games (like mine) and you were stuck with electric football and Rock ‘em Sock ‘em robots:   And, lest the “combatants” become unruly or – God forbid – afternoon snacks were late, Orange County’s finest was on the scene to keep the peace.  On a high-tech mode of transport, of course.   She wasn’t the only one to think this was a swell way to transition from one concourse to the next.  Given the level of support provided by the entire Orange County Convention Center staff, I knew they had to have some secret.   Here’s one entrance to the vendor zone/”Technical Learning Center.”  Couldn’t help but think of them as the remora attached to the Whale Shark that is Microsoft…   …or perhaps planets orbiting the sun. Microsoft is just that huge and it seemed like every vendor in the industry looks forward to partnering with the tech behemoth.   Aside from the free stuff from the vendors, probably the most popular place in the house was the dining area.  Amazing spreads every day, multiple times a day.  While no attendance numbers were available at press time, literally thousands of attendees were fed, and fed well, every day.  And lest you think my post from earlier in the week exaggerated about the backpacks…   …or that I’m exaggerating about the lunch crowds.  This represents only about between 25-30% of the lunch crowd – it was all my camera could capture at once.  No one went away hungry.   The only thing missing was a a vat of Red Bull but apparently organizers went old school, with probably 100 urns of the original energy drink – coffee – all around the venue.   Of course, following lunch and afternoon sessions, some preferred the even older school method of re-energizing.  There were rumors that Microsoft was serving graham crackers and milk in this area.  But they were only rumors.   Cannot overstate the wonderful service provided by the Orange County Convention Center staff.  Coffee, soft drinks, juice, and water were available always.  Buffet meals were delicious with a wide range of healthy options available, in addition to hundreds (at least) special meal requests supported every day.  Ever tried to keep up with an estimated 9,000 hungry and thirsty IT-ers?  These folks did.  Kudos to all of the staff and many thanks!   And while I occasionally poke fun at the Whale Shark, if nothing else this experience convinced me of one thing:  Microsoft knows how to put on a professional event.  Hundreds of informative, professionally delivered sessions, covering a wide range of topics set at varying levels of expertise (some that even I was able to follow), social activities, vendor partnerships…they brought everything you could ask for to inform, educate, and inspire an entire IT industry.   So as I depart the belly of the beast, I can both take pride in the fact that I survived the week and marvel at the brilliance surrounding me.  The IT industry – or at least the segment associated with Microsoft – is in good, professional hands.  And what won’t fit in their hands can be toted in the Microsoft provided backpacks.  Win-win.   Until New Orleans…

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• Why Software Sucks...and What You Can Do About It – book review

  - by DigiMortal

      How do our users see the products we are writing for them and how happy they are with our work? Are they able to get their work done without fighting with cool features and crashes or are they just switching off resistance part of their brain to survive our software? Yeah, the overall picture of software usability landscape is not very nice. Okay, it is not even nice. But, fortunately, Why Software Sucks...and What You Can Do About It by David S. Platt explains everything. Why Software Sucks… is book for software users but I consider it as a-must reading also for developers and specially for their managers whose politics often kills all usability topics as soon as they may appear. For managers usability is soft topic that can be manipulated the way it is best in current state of project. Although developers are not UI designers and usability experts they are still very often forced to deal with these topics and this is how usability problems start (of course, also designers are able to produce designs that are stupid and too hard to use for users, but this blog here is about development). I found this book to be very interesting and funny reading. It is not humor book but it explains you all so you remember later very well what you just read. It took me about three evenings to go through this book and I am still enjoying what I found and how author explains our weird young working field to end users. I suggest this book to all developers – while you are demanding your management to hire or outsource usability expert you are at least causing less pain to end users. So, go and buy this book, just like I did. And… they thanks to mr. Platt :) There is one book more I suggest you to read if you are interested in usability - Don't Make Me Think: A Common Sense Approach to Web Usability, 2nd Edition by Steve Krug. Editorial review from Amazon Today’s software sucks. There’s no other good way to say it. It’s unsafe, allowing criminal programs to creep through the Internet wires into our very bedrooms. It’s unreliable, crashing when we need it most, wiping out hours or days of work with no way to get it back. And it’s hard to use, requiring large amounts of head-banging to figure out the simplest operations. It’s no secret that software sucks. You know that from personal experience, whether you use computers for work or personal tasks. In this book, programming insider David Platt explains why that’s the case and, more importantly, why it doesn’t have to be that way. And he explains it in plain, jargon-free English that’s a joy to read, using real-world examples with which you’re already familiar. In the end, he suggests what you, as a typical user, without a technical background, can do about this sad state of our software—how you, as an informed consumer, don’t have to take the abuse that bad software dishes out. As you might expect from the book’s title, Dave’s expose is laced with humor—sometimes outrageous, but always dead on. You’ll laugh out loud as you recall incidents with your own software that made you cry. You’ll slap your thigh with the same hand that so often pounded your computer desk and wished it was a bad programmer’s face. But Dave hasn’t written this book just for laughs. He’s written it to give long-overdue voice to your own discovery—that software does, indeed, suck, but it shouldn’t. Table of contents Acknowledgments xiii Introduction Chapter 1: Who’re You Calling a Dummy? Where We Came From Why It Still Sucks Today Control versus Ease of Use I Don’t Care How Your Program Works A Bad Feature and a Good One Stopping the Proceedings with Idiocy Testing on Live Animals Where We Are and What You Can Do Chapter 2: Tangled in the Web Where We Came From How It Works Why It Still Sucks Today Client-Centered Design versus Server-Centered Design Where’s My Eye Opener? It’s Obvious—Not! Splash, Flash, and Animation Testing on Live Animals What You Can Do about It Chapter 3: Keep Me Safe The Way It Was Why It Sucks Today What Programmers Need to Know, but Don’t A Human Operation Budgeting for Hassles Users Are Lazy Social Engineering Last Word on Security What You Can Do Chapter 4: Who the Heck Are You? Where We Came From Why It Still Sucks Today Incompatible Requirements OK, So Now What? Chapter 5: Who’re You Looking At? Yes, They Know You Why It Sucks More Than Ever Today Users Don’t Know Where the Risks Are What They Know First Milk You with Cookies? Privacy Policy Nonsense Covering Your Tracks The Google Conundrum Solution Chapter 6: Ten Thousand Geeks, Crazed on Jolt Cola See Them in Their Native Habitat All These Geeks Who Speaks, and When, and about What Selling It The Next Generation of Geeks—Passing It On Chapter 7: Who Are These Crazy Bastards Anyway? Homo Logicus Testosterone Poisoning Control and Contentment Making Models Geeks and Jocks Jargon Brains and Constraints Seven Habits of Geeks Chapter 8: Microsoft: Can’t Live With ’Em and Can’t Live Without ’Em They Run the World Me and Them Where We Came From Why It Sucks Today Damned if You Do, Damned if You Don’t We Love to Hate Them Plus ça Change Growing-Up Pains What You Can Do about It The Last Word Chapter 9: Doing Something About It 1. Buy 2. Tell 3. Ridicule 4. Trust 5. Organize Epilogue About the Author

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• Building the Elusive Windows Phone Panorama Control

  When the Windows Phone 7 Developer SDK was released a couple of weeks ago at MIX10 many people noticed the SDK doesnt include a template for a Panorama control.   Here at Clarity we decided to build our own Panorama control for use in some of our prototypes and I figured I would share what we came up with. There have been a couple of implementations of the Panorama control making their way through the interwebs, but I didnt think any of them really nailed the experience that is shown in the simulation videos.   One of the key design principals in the UX Guide for Windows Phone 7 is the use of motion.  The WP7 OS is fairly stripped of extraneous design elements and makes heavy use of typography and motion to give users the necessary visual cues.  Subtle animations and wide layouts help give the user a sense of fluidity and consistency across the phone experience.  When building the panorama control I was fairly meticulous in recreating the motion as shown in the videos.  The effect that is shown in the application hubs of the phone is known as a Parallax Scrolling effect.  This this pseudo-3D technique has been around in the computer graphics world for quite some time. In essence, the background images move slower than foreground images, creating an illusion of depth in 2D.  Here is an example of the traditional use: http://www.mauriciostudio.com/.  One of the animation gems I've learned while building interactive software is the follow animation.  The premise is straightforward: instead of translating content 1:1 with the interaction point, let the content catch up to the mouse or finger.  The difference is subtle, but the impact on the smoothness of the interaction is huge.  That said, it became the foundation of how I achieved the effect shown below.   Source Code Available HERE Before I briefly describe the approach I took in creating this control..and Ill add some **asterisks ** to the code below as my coding skills arent up to snuff with the rest of my colleagues.  This code is meant to be an interpretation of the WP7 panorama control and is not intended to be used in a production application.  1.  Layout the XAML The UI consists of three main components :  The background image, the Title, and the Content.  You can imagine each  these UI Elements existing on their own plane with a corresponding Translate Transform to create the Parallax effect.  2.  Storyboards + Procedural Animations = Sexy As I mentioned above, creating a fluid experience was at the top of my priorities while building this control.  To recreate the smooth scroll effect shown in the video we need to add some place holder storyboards that we can manipulate in code to simulate the inertia and snapping.  Using the easing functions built into Silverlight helps create a very pleasant interaction.    3.  Handle the Manipulation Events With Silverlight 3 we have some new touch event handlers.  The new Manipulation events makes handling the interactivity pretty straight forward.  There are two event handlers that need to be hooked up to enable the dragging and motion effects: the ManipulationDelta event :  (the most relevant code is highlighted in pink) Here we are doing some simple math with the Manipulation Deltas and setting the TO values of the animations appropriately. Modifying the storyboards dynamically in code helps to create a natural feel.something that cant easily be done with storyboards alone.   And secondly, the ManipulationCompleted event:  Here we take the Final Velocities from the Manipulation Completed Event and apply them to the Storyboards to create the snapping and scrolling effects.  Most of this code is determining what the next position of the viewport will be.  The interesting part (shown in pink) is determining the duration of the animation based on the calculated velocity of the flick gesture.  By using velocity as a variable in determining the duration of the animation we can produce a slow animation for a soft flick and a fast animation for a strong flick. Challenges to the Reader There are a couple of things I didnt have time to implement into this control.  And I would love to see other WPF/Silverlight approaches.  1.  A good mechanism for deciphering when the user is manipulating the content within the panorama control and the panorama itself.   In other words, being able to accurately determine what is a flick and what is click. 2.  Dynamically Sizing the panorama control based on the width of its content.  Right now each control panel is 400px, ideally the Panel items would be measured and then panorama control would update its size accordingly.  3.  Background and content wrapping.  The WP7 UX guidelines specify that the content and background should wrap at the end of the list.  In my code I restrict the drag at the ends of the list (like the iPhone).  It would be interesting to see how this would effect the scroll experience.     Well, Its been fun building this control and if you use it Id love to know what you think.  You can download the Source HERE or from the Expression Gallery  Erik Klimczak  | [email protected] | twitter.com/eklimczDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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