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  • Shell Script Launching Child Processes

    - by Matt James
    Disclaimer: I'm totally new to shell scripting, but have quite a bit of experience in other languages like PHP and Obj-C. I'm writing my first daemon script. Here are the goals: I want it to run in the background I want it to be triggered by an init.d script that includes start/stop/restart commands I want each process in a loop to trigger its own subprocess. When the parent process kicked off by the init.d script is killed, I want the subprocesses to die as well. Essentially, I'm looking for the same kind of behavior that appears to be very common among software like apache, spamd, dovecot, etc. But, based on my research, I haven't found a single, simple answer as to how this kind of thing is achieved. Any help is greatly appreciated.

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  • Samsung 830 very slow benchmark numbers

    - by alekop
    I just bought a new SSD, and installed a fresh copy of Windows on it. I didn't see any noticeable difference in boot times, app start-up times, so I decided to benchmark it. Asus P7P55D-E Intel i5-760 Samsung 830 256GB SATA III Windows 7 Ultimate 64-bit The Windows experience index gave the drive a 7.3 rating, but real-world performance is not particularly impressive. Any ideas why the numbers are so low? UPDATE: It turns out that SATA III support is turned off by default on the P7P55D motherboard. After enabling it in BIOS (Tools - Level Up), the scores went up: Read Write Seq 325 183 4K 16 49 IOPS 32K 28K It's an improvement, but still far below what they should be for this drive.

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  • postfix 5.7.1 Relay access denied when sending mail with cron

    - by zensys
    Reluctant to ask because there is so much here about 'postfix relay access denied' but I cannot find my case: I use php (Zend Framework) to send emails outside my network using the Google mail server because I could not send mail outside my server (user: web). However when I sent out an email via cron (user: root, I believe), still using ZF, using the same mail config/credentials, I get the message: '5.7.1 Relay access denied' I guess I need to know one of two things: 1. How can I use the google smtp server from cron 2. What do I need to change in my config to send mail using my own server instead of google Though the answer to 2. is the more structural solution I assume, I am quite happy with an answer to 1. as well because I think Google is better at server maintaince (security/spam) than I am. Below my ZF application.ini mail section, main.cf and master.cf: application.ini: resources.mail.transport.type = smtp resources.mail.transport.auth = login resources.mail.transport.host = "smtp.gmail.com" resources.mail.transport.ssl = tls resources.mail.transport.port = 587 resources.mail.transport.username = [email protected] resources.mail.transport.password = xxxxxxx resources.mail.defaultFrom.email = [email protected] resources.mail.defaultFrom.name = "my company" main.cf: # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = /usr/share/doc/postfix # TLS parameters smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. myhostname = mail.second-start.nl mydomain = second-start.nl alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all html_directory = /usr/share/doc/postfix/html message_size_limit = 30720000 virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /home/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes # see under Spam smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps virtual_transport = dovecot dovecot_destination_recipient_limit = 1 # Spam disable_vrfy_command = yes smtpd_delay_reject = yes smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, check_helo_access hash:/etc/postfix/helo_access, reject_non_fqdn_hostname, reject_invalid_hostname, permit smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination, reject_invalid_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_mynetworks, reject_non_fqdn_hostname, reject_rbl_client sbl.spamhaus.org, reject_rbl_client zen.spamhaus.org, reject_rbl_client cbl.abuseat.org, reject_rbl_client bl.spamcop.net, permit smtpd_error_sleep_time = 1s smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 20 master.cf: # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - - - - smtpd #smtp inet n - - - 1 postscreen #smtpd pass - - - - - smtpd #dnsblog unix - - - - 0 dnsblog #tlsproxy unix - - - - 0 tlsproxy #submission inet n - - - - smtpd # -o smtpd_tls_security_level=encrypt # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #smtps inet n - - - - smtpd # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - - - - qmqpd pickup fifo n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - - 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - - - - smtp # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - - - - smtp -o smtp_fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - - - - showq error unix - - - - - error retry unix - - - - - error discard unix - - - - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. # # Many of the following services use the Postfix pipe(8) delivery # agent. See the pipe(8) man page for information about ${recipient} # and other message envelope options. # ==================================================================== # # maildrop. See the Postfix MAILDROP_README file for details. # Also specify in main.cf: maildrop_destination_recipient_limit=1 # maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient} # # ==================================================================== # # Recent Cyrus versions can use the existing "lmtp" master.cf entry. # # Specify in cyrus.conf: # lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4 # # Specify in main.cf one or more of the following: # mailbox_transport = lmtp:inet:localhost # virtual_transport = lmtp:inet:localhost # # ==================================================================== # # Cyrus 2.1.5 (Amos Gouaux) # Also specify in main.cf: cyrus_destination_recipient_limit=1 # #cyrus unix - n n - - pipe # user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user} # # ==================================================================== # Old example of delivery via Cyrus. # #old-cyrus unix - n n - - pipe # flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user} # # ==================================================================== # # See the Postfix UUCP_README file for configuration details. # uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # Other external delivery methods. # ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient scalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension} mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -d ${recipient}

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  • Cannot run SSH or send commands to /etc/init.d/ssh

    - by ThinkBohemian
    When I attempt to execute any commands such as /etc/init.d/ssh restart or /etc/init.d/ssh start, I get no output. It just goes to the next command line (Ubuntu Hardy). I can even pass in junk parameters such as /etc/init.d/ssh asldkfjalskfdj and i get no warnings or error messages, it just goes to the next line. I can check in my processes: lsof -i :22 and don't see my ssh process. I also don't see my SSH process when i run: netstat -na --inet Any troubleshooting suggestions?

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  • cmd files to hta

    - by Frode Eskil
    I have a lot of cmd files i use daily for example to add users to local groups, installing printers, run as admin tasks etc. I like to take the scripts i use most frequently and add them to a tabbed hta file, but i have trouble finding a good guide on how to easily do it. Anyone having a good site to share with me? Or do i finally have to start with vb scripting? I have done some but it's so much faster to do a cmd file for me.

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  • What's the best way to Notify network users of outages or maintenance

    - by Dubs
    There are times when one of our applications is down for maintenance and we'd like to let our users know about it before they start flooding our help desk with calls. What's the best way to notify our users of an event on the network? Some users are on our intranet, while others log in from the Web. Is there an application they can install to which we can send notifications messages? I'm interested to hear what others have come up with to address this requirement. Thanks!

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  • Problem with running php script using mysql on tomcat

    - by Peter
    I am using tomcat 6 with JavaBridge. I have stored my php script in the following location. C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\project\test.php In test.php I am using curl and mysql. The php.ini in JavaBridge is stored in the following location C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\WEB-INF\cgi\php.ini and its contents are - extension_dir="C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\WEB-INF\cgi\x86-windows\ext" include_path="C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\WEB-INF\pear;." there is also a config file called mysql.ini whose contents are - extension = php_mysql.dll I had also installed wamp earlier so I copied all the dll's from C:\wamp\bin\php\php5.3.0\ext to C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\WEB-INF\cgi\x86-windows\ext When I start tomcat and run my script I get the following error - Fatal error: Call to undefined function mysqli_connect() in C:\Program Files\apache-tomcat-6.0.26\webapps\JavaBridge\project\test.php on line 534 Please help.

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  • Laptop wakes from sleep, once, due to audio controller (Windows 7)

    - by stijn
    The laptop is a recent Dell XPS 15z and the problem is as follows (reproducible about 90% of tries): put laptop to sleep using either Start-Sleep or closing the lid laptop goes to sleep after about 5 seconds, but instantly wakes again showing a black screen (touching the keyboard or moving the mouse shows the login screen one normally gets after wake) login again, put laptop to sleep latop stays in sleep mode output of powercfg -lastwake after the first instant wake shows the audio controller is responsible. Why would that be, why only the first try, and how to fix this? Wake History Count - 1 Wake History [0] Wake Source Count - 1 Wake Source [0] Type: Device Instance Path: PCI\VEN_8086&DEV_1C20&SUBSYS_04461028&REV_05\3&11583659&0&D8 Friendly Name: Description: High Definition Audio Controller Manufacturer: Microsoft

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  • How to automatically disable secondary monitor in Windows 7

    - by Phenom
    My primary monitor is attached to my onboard video card. My secondary monitor is attached to my PCI-E card. When I first start my computer, only the primary monitor is on, and it is the only monitor that is recognized. While I'm in Windows 7, if I turn on my secondary monitor, Windows 7 automatically detects it, and expands my desktop to stretch across both monitors. But if I turn off the secondary monitor, Windows 7 doesn't automatically disable it. Is there a way I can get it to automatically disable when I turn it off, or is there a utility that makes it easier to disable it instead of having to go to screen resolution?

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  • fdisk -l shows a partition is not in /dev directory

    - by zitronic
    I am having troubles on mounting my ntfs hard drive on linux. I am running ophcrack live CD. fdisk shows me the hard drive I have installed on my computer fdisk -l Disk /dev/hdc: 30.0 GB, 30005821440 bytes 255 heads, 63 sectors/track, 3648 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hdc1 * 1 3647 29294496 7 HPFS/NTFS but I dont have that device on my /dev directory so I can not mount it ls /dev/hd* /dev/hda /dev/hda4 /dev/hda8 /dev/hdb2 /dev/hdb6 /dev/hdc /dev/hda1 /dev/hda5 /dev/hda9 /dev/hdb3 /dev/hdb7 /dev/hdd /dev/hda2 /dev/hda6 /dev/hdb /dev/hdb4 /dev/hdb8 /dev/hda3 /dev/hda7 /dev/hdb1 /dev/hdb5 /dev/hdb9 What could be going on_

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  • Pause/play AJAX on particular tabs in firefox

    - by bguiz
    Hi, I want to know if there is some method to disable AJAX on particular tabs within Firefox and re-enable them later. My concern is that I have metered bandwidth, and I need to conserve my usage. But I also like to leave several Gmail tabs open in the background. It would be great if I could just hit a "Pause AJAX" button, to stop the contents of that tab from sending or receiving anything, and then later on hit a "Play" button when I want it to start doing its thing again. Any suggestions?

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  • Ubuntu not showing disk

    - by ojek
    I have a laptop which had broken windows 7 installed on it. I created a ubuntu live usb and tried installing ubuntu over that win7. After a few minutes, I got an error message, so I needed to restart the computer. Now the laptop says that there is no bootable device - reasonable message given that there was an error during linux installation. But: Bios can see my hard drive, When I start ubuntu in live mode, and try either sudo fdisk -l or gparted, it doesn't show any hard disk drives. I am 90% sure that hdd is broken, but it is wierd that bios can see it, and ubuntu doesn't. How can I be 100% sure about that hdd? Is there any additional way of detecting my hdd from ubuntu?

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  • Configure TV Capture card to not use external audio jack for TV audio output

    - by Adam D.
    I had this working with MythTV on Ubuntu 9.1. Then a power surge killed the motherboard. After replacing the motherboard, ram and cpu, the card does not produce any audio except through the output jack on the back of the card. I do not want to use a cable to go from the back of the card to the audio in on the built in sound card of the new mother board. FYI, the old motherboard did not have an on-board sound card. There was a separate audio card installed. There's some configuration that has to be done to have it work the same way again. I just have no idea where to start. This is regarding wintv hauppauge mythtv linux ubuntu 9.10 audio

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  • Bash delete file when variable = x

    - by twigg
    I'm creating a bash script which reboots the system at each reboot it adds a new line to a text file, I then read the text file before each reboot. Once the variable holding the number of lines reaches say 10 I want the script to delete the text file (at which point on the next reboot it will see the file isn't there, brake the loop and promote the user to start again). I tried this: exec < text.txt nol=0 while read line do nol=`expr $nol + 1` done reboot_count=10 if ["$nol" == "$reboot_count"]; then rm text.txt fi but this doesn't seem to be working, all help is appreciated :)

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  • pecl_http extension not loading

    - by Tegan Snyder
    For some reason pecl_http extension is not showing up in my test.php file with contains: <?php phpinfo(); ?> I just installed pecl_http using: pecl install pecl_http The install was successful and I verified it by running: pecl list Installed packages, channel pecl.php.net: ========================================= Package Version State mongo 1.2.10 stable pecl_http 1.7.4 stable I then located my php.ini file using: php -i | grep 'Configuration File' Configuration File (php.ini) Path => /etc/php5/cli Loaded Configuration File => /etc/php5/cli/php.ini I edited it in vim and added: extension=http.so Finally I restarted Nginx and PHP-FastCGI: /etc/init.d/nginx restart /etc/init.d/php-fastcgi stop /etc/init.d/php-fastcgi start My PHP extension_dir is : /usr/lib/php5/20090626 I verified that "http.so" is located in that directory. Any ideas why it's not loading? My machine is running a Ubuntu 10.04 LTS 64bit Profile on Linode. The only other extensions I have installed are New Relic and Mongo. Thanks!

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  • Antialias not working in ubuntu lucid lynx 10.04

    - by mac
    I have recently upgraded from karmic to lucid (plain ubuntu using gnome). Everything worked fine, but the characters now aren't anti-aliased any more, as you can appreciate from the screenshot: This is what I tried to fix the situation, unluckily without succeeding: Used the regular option pane from System-Preference-Appearance-Font (smoothing, hinting...) Edited the .fonts.conf file Disinstalling (and then re-installing) the mstcorefont package Changing the default Sans font to a font of my liking (e.g. Tahoma) from the abovementioned Appearance options My ubuntu installation is quite standard, with the typical add-ons one might wish for usability. I used the ubuntu start script to make a few tweaks. Thank you in advance for your help! :)

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  • Running SQL*Plus with bash causes wrong encoding

    - by Petr Mensik
    I have a problem with running SQL*Plus in the bash. Here is my code #!/bin/bash #curl http://192.168.168.165:8080/api_test/xsql/f_exp_order_1016.xsql > script.sql wget -O script.sql 192.168.168.165:8080/api_test/xsql/f_exp_order_1016.xsql set NLS_LANG=_.UTF8 sqlplus /nolog << ENDL connect login/password set sqlblanklines on start script.sql exit <<endl I download the insert statements from our intranet, put it into sql file and run it through SQL*Plus. This is working fine. My problem is that when I save the file script.sql my encoding goes wrong. All special characters(like íášc) are broken and that's causing inserting wrong characters into my DB. Encoding of that file is UTF-8, also UTF-8 is set on the XSQL page on our intranet. So I really don't know where could be a problem. And also any advices regarding to my script are welcomed, I am total newbie in Linux scripting:-)

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  • Solaris Non global Zone x server

    - by ankimal
    I am not even sure if this is possible but how can I start an X server on a non-global zone? If I run startx from within my zone. I created the xorg.conf by running /usr/X11/bin/xorgconfig root@foo:/usr/X11/bin# startx xauth: creating new authority file /root/.serverauth.20957 X.Org X Server 1.5.3 Release Date: 5 November 2008 X Protocol Version 11, Revision 0 Build Operating System: SunOS 5.11 snv_108 i86pc Current Operating System: SunOS dsol101 5.11 snv_111b i86pc Build Date: 07 May 2009 04:44:56PM Solaris ABI: 64-bit SUNWxorg-server package version: 6.9.0.5.11.11100,REV=0.2009.05.07 SUNWxorg-mesa package version: 6.9.0.5.11.11100,REV=0.2009.04.02 Before reporting problems, check http://sunsolve.sun.com/ to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov 10 19:17:53 2009 (==) Using config file: "/etc/X11/xorg.conf" Fatal server error: xf86OpenConsole: Cannot open /dev/fb (No such file or directory)

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  • Dropbox won't connect on Ubuntu 10.10 (Waiting For Connection)

    - by slhck
    I run Ubuntu 10.10 (2.6.35-25) on an x86 machine and try to install Dropbox by downloading the latest .deb file from the website. Now, first it will install dropbox-nautilus (requiring me to restart Nautilus before that) and then ask me to start Dropbox itself. The Dropbox client opens and indefinitely waits for a connection as there is a connection error. Of course, I don't use a proxy server and I'm writing this post from this very machine, so there's no problem with the internet connection. I'm not using a firewall (at least not that I know of, the Ubuntu installation is relatively untouched so far). Does anybody have some pointers?

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  • How can I have Windows 8 go to the desktop by default?

    - by Schnapple
    I've played around a smidge with the Windows 8 Consumer Preview in a VirtualBox VM and I think the improvements under the hood may be worth tolerating the Metro UI crap. I don't like that the entire screen changes to something I don't care about when I hit the Windows key and start typing but I can deal with it. The one thing I cannot stand, though, is that it starts in the Metro interface by default. I have to hit the "Desktop" tile to get to a normal interface, and while I can hit "escape" to go back to the desktop and dismiss Metro, it doesn't work when you first log in. When you first log in, you have to hit that "Desktop" tile. I know that the Enterprise versions of Windows 8 will go to the desktop by default. I don't know but I would assume that there's probably some registry key that would handle this. Has anyone figured that out yet?

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  • Do browsers allows pages loaded on one tab to access/intercept/inject data in other tabs?

    - by jairo
    I was surprised to hear from this Reuters video that it was possible for a page loaded on one tab to access and/or inject data onto another page loaded on a different tab. TL;DW (too lazy; didn't watch) The interviewee in the video suggests that when doing online banking, the user exit his browser (thus closing all windows) and start a new browser session with just your banking page/tab open. Allegedly, malicious sites can check if you have your banking site open and inject commands onto those sites. Can someone confirm and/or deny this claim? Is it only possible even if there is not parent/child relationship between windows/tabs?

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  • WinSCP equivalent for Linux/Ubuntu

    - by Shashank
    I'm shifting most of my projects to a Linux machine, and one of the things that I miss is WinSCP. I've found other answers saying that nautilus, FileZilla etc. can be used for SFTP, but something that I loved about WinSCP was that it has two panes (FileZilla's got that) and I could start synchronization from any directory. Unison or Rsync could work, but I'd have to create a folder pair every time I want to sync two folders. Is there an SFTP client for Linux that has a two-paned view and allows ad-hoc synchronization? Thanks!

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  • Private cloud solution [Eucalyptus,OpenStack, Nimbus] for Java deployments [Glassfish, Tomcat]

    - by Tadas D.
    I am interested in a way to have private cloud which would host Glassfish (or Tomcat) server. Which option from Eucalyptus, Openstack or Nimbus would be best to deploy java applications on it? Or maybe there is something other and I am looking wrong at the problem? The way I imagine this, that I should have some shared storage that I could expand by introducing new nodes to this cluster and have easy management for glassfish instances: something like virtual machines images that I can start and stop on demand and that image is shared among nodes. I don't need concrete step-by-step solution here but guidelines how this should be done are very welcome.

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  • How to define a layered model for Storage Architecture ?

    - by Berkay
    i don't have enough knowledge about storage systems but have to tell my audiences about how storage works in organization data centers. For this purpose to keep things simple, first i want to show them a layer model then from top to bottom and then i want to explore all these layers. What i mean by layered model in storage architecture? i want to start my presentation something like that, first layer can be applications, application request a data from storage and then ... ... (the topics i want to cover are file sytems, metadata,the physical implementation of storage (das, nas etc.) ... the request comes to the storage device and storage device (depends on the technology) goes through the disk and disk send back the data using iscsi protol, we can say that the iscsi protocol managing the path between... ... if you help me explain these steps layer by layer by examples and key technologies to be defined, really appreciate it. thanks.

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  • Citrix Secure Gateway not redirecting to login URL

    - by Dave
    We have an older setup for XenApp - users log in through Citrix Secure Gateway running on a windows box. (We hope to start using a NetScaler soon.) Earlier today, connections to https://citrix.company.com/ starting throwing up a 503 error page, instead of redirecting to https://citrix.company.com/Citrix/XenApp/ If you go directly to the /Citrix/Xenapp/ URL, the user is properly directed to the login page, and can launch apps. We've restarted the service, and rebooted the server. We haven't yet tried uninstalling and reinstalling the software. Before we do this, I'm looking for ideas as to how we can get the redirect working again without a fairly major outage window. To make things more interesting, many of our users have Citrix Receiver installed, also pointed at https://citrix.company.com/. Receiver makes itself the default launcher for ICA files, and gives a connection error when it tries to load apps - probably because of the same non-functional rediect?

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