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• Serving only certain files from a directory to users on IIS7

  - by HarbingTarbl

  I'm have a need to show the most up to date version of a certain file in a directory to users who access a folder on my site (lets call this folder logs). I can't just move the file into the folder as another process relies on being able to find and edit this file while it is running. At first I had thought I could just create a folder on my site, give it the correct permissions and then create a symbolic link to the file. However it seems IIS7 does not follow symlinks. Another solution would be to create a phpscript that pulls the correct file and displays it, but that felt like over-engineering the solution. I know that on Apache this would be simple, but I can't figure out how to do it with IIS7. To give an idea of the folder structure I'm working with. The directory looks like this. Root --File I need to serve. --File containing plain text passwords. --Other folders/files. I can't move any of these files. If I just serve the entire directory using Virtual Directories in IIS I'll also be sharing files and folders containing configuration and other sensitive information.

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• Defeating the RAID5 write hole with ZFS (but not RAID-Z) [closed]

  - by Michael Shick

  I'm setting up a long-term storage system for keeping personal backups and archives. I plan to have RAID5 starting with a relatively small array and adding devices over time to expand storage. I may also want to convert to RAID6 down the road when the array gets large. Linux md is a perfect fit for this use case since it allows both of the changes I want on a live array and performance isn't at all important. Low cost is also great. Now, I also want to defend against file corruption, so it looked like a RAID-Z1 would be a good fit, but evidently I would only be able to add additional RAID5 (RAID-Z1) sets at a time rather than individual drives. I want to be able to add drives one at a time, and I don't want to have to give up another device for parity with every expansion. So at this point, it looks like I'll be using a plain ZFS filesystem on top of an md RAID5 array. That brings me to my primary question: Will ZFS be able to correct or at least detect corruption resulting from the RAID5 write hole? Additionally, any other caveats or advice for such a set up is welcome. I'll probably be using Debian, but I'll definitely be using Linux since I'm familiar with it, so that means only as new a version of ZFS as is available for Linux (via ZFS-FUSE or so).

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• Can't get simple Apache VHost up and running

  - by TK Kocheran

  Unfortunately, I can't seem to get a simple Apache VHost online. I used to simply have one VHost which bound to all: <VirtualHost *:80>, but this isn't appropriate for security anymore. I need to have one VHost for localhost requests (ie my dev server) and one for incoming requests via my domain name. Here's my new VHost: NameVirtualHost domain1.com <VirtualHost domain1.com:80> DocumentRoot /var/www ServerName domain1.com </VirtualHost> <VirtualHost domain2.com:80> DocumentRoot /var/www ServerName domain2.com </VirtualHost> After I restart my server, I see the following errors in my log: [Wed Feb 16 11:26:36 2011] [error] [client ####.###.###.###] File does not exist: /htdocs [Wed Feb 16 11:26:36 2011] [error] [client ####.###.###.###] File does not exist: /htdocs What am I doing wrong? EDIT As per the answer give below, I have modified my configuration. Here are my configuration files: /etc/apache2/ports.conf: Listen 80 <IfModule mod_ssl.c> # If you add NameVirtualHost *:443 here, you will also have to change # the VirtualHost statement in /etc/apache2/sites-available/default-ssl # to <VirtualHost *:443> # Server Name Indication for SSL named virtual hosts is currently not # supported by MSIE on Windows XP. Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> Here are my actual defined sites: /etc/apache2/sites-enabled/000-localhost: NameVirtualHost 127.0.0.1:80 <VirtualHost 127.0.0.1:80> ServerAdmin ######### DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> RewriteEngine On RewriteLog "/var/log/apache2/mod_rewrite.log" RewriteLogLevel 9 <Location /> <Limit GET POST PUT> order allow,deny allow from all deny from 65.34.248.110 deny from 69.122.239.3 deny from 58.218.199.147 deny from 65.34.248.110 </Limit> </Location> </VirtualHost> /etc/apache2/sites-enabled/001-rfkrocktk.dyndns.org: NameVirtualHost rfkrocktk.dyndns.org:80 <VirtualHost rfkrocktk.dyndns.org:80> DocumentRoot /var/www ServerName rfkrocktk.dyndns.org </VirtualHost> And, just for kicks, my main file: /etc/apache2/apache2.conf: # # Based upon the NCSA server configuration files originally by Rob McCool. # # This is the main Apache server configuration file. It contains the # configuration directives that give the server its instructions. # See http://httpd.apache.org/docs/2.2/ for detailed information about # the directives. # # Do NOT simply read the instructions in here without understanding # what they do. They're here only as hints or reminders. If you are unsure # consult the online docs. You have been warned. # # The configuration directives are grouped into three basic sections: # 1. Directives that control the operation of the Apache server process as a # whole (the 'global environment'). # 2. Directives that define the parameters of the 'main' or 'default' server, # which responds to requests that aren't handled by a virtual host. # These directives also provide default values for the settings # of all virtual hosts. # 3. Settings for virtual hosts, which allow Web requests to be sent to # different IP addresses or hostnames and have them handled by the # same Apache server process. # # Configuration and logfile names: If the filenames you specify for many # of the server's control files begin with "/" (or "drive:/" for Win32), the # server will use that explicit path. If the filenames do *not* begin # with "/", the value of ServerRoot is prepended -- so "/var/log/apache2/foo.log" # with ServerRoot set to "" will be interpreted by the # server as "//var/log/apache2/foo.log". # ### Section 1: Global Environment # # The directives in this section affect the overall operation of Apache, # such as the number of concurrent requests it can handle or where it # can find its configuration files. # # # ServerRoot: The top of the directory tree under which the server's # configuration, error, and log files are kept. # # NOTE! If you intend to place this on an NFS (or otherwise network) # mounted filesystem then please read the LockFile documentation (available # at <URL:http://httpd.apache.org/docs-2.1/mod/mpm_common.html#lockfile>); # you will save yourself a lot of trouble. # # Do NOT add a slash at the end of the directory path. # ServerRoot "/etc/apache2" # # The accept serialization lock file MUST BE STORED ON A LOCAL DISK. # #<IfModule !mpm_winnt.c> #<IfModule !mpm_netware.c> LockFile /var/lock/apache2/accept.lock #</IfModule> #</IfModule> # # PidFile: The file in which the server should record its process # identification number when it starts. # This needs to be set in /etc/apache2/envvars # PidFile ${APACHE_PID_FILE} # # Timeout: The number of seconds before receives and sends time out. # Timeout 300 # # KeepAlive: Whether or not to allow persistent connections (more than # one request per connection). Set to "Off" to deactivate. # KeepAlive On # # MaxKeepAliveRequests: The maximum number of requests to allow # during a persistent connection. Set to 0 to allow an unlimited amount. # We recommend you leave this number high, for maximum performance. # MaxKeepAliveRequests 100 # # KeepAliveTimeout: Number of seconds to wait for the next request from the # same client on the same connection. # KeepAliveTimeout 15 ## ## Server-Pool Size Regulation (MPM specific) ## # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # event MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> # These need to be set in /etc/apache2/envvars User ${APACHE_RUN_USER} Group ${APACHE_RUN_GROUP} # # AccessFileName: The name of the file to look for in each directory # for additional configuration directives. See also the AllowOverride # directive. # AccessFileName .htaccess # # The following lines prevent .htaccess and .htpasswd files from being # viewed by Web clients. # <Files ~ "^\.ht"> Order allow,deny Deny from all Satisfy all </Files> # # DefaultType is the default MIME type the server will use for a document # if it cannot otherwise determine one, such as from filename extensions. # If your server contains mostly text or HTML documents, "text/plain" is # a good value. If most of your content is binary, such as applications # or images, you may want to use "application/octet-stream" instead to # keep browsers from trying to display binary files as though they are # text. # DefaultType text/plain # # HostnameLookups: Log the names of clients or just their IP addresses # e.g., www.apache.org (on) or 204.62.129.132 (off). # The default is off because it'd be overall better for the net if people # had to knowingly turn this feature on, since enabling it means that # each client request will result in AT LEAST one lookup request to the # nameserver. # HostnameLookups Off # ErrorLog: The location of the error log file. # If you do not specify an ErrorLog directive within a <VirtualHost> # container, error messages relating to that virtual host will be # logged here. If you *do* define an error logfile for a <VirtualHost> # container, that host's errors will be logged there and not here. # ErrorLog /var/log/apache2/error.log # # LogLevel: Control the number of messages logged to the error_log. # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. # LogLevel warn # Include module configuration: Include /etc/apache2/mods-enabled/*.load Include /etc/apache2/mods-enabled/*.conf # Include all the user configurations: Include /etc/apache2/httpd.conf # Include ports listing Include /etc/apache2/ports.conf # # The following directives define some format nicknames for use with # a CustomLog directive (see below). # If you are behind a reverse proxy, you might want to change %h into %{X-Forwarded-For}i # LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %O" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent # # Define an access log for VirtualHosts that don't define their own logfile CustomLog /var/log/apache2/other_vhosts_access.log vhost_combined # Include of directories ignores editors' and dpkg's backup files, # see README.Debian for details. # Include generic snippets of statements Include /etc/apache2/conf.d/ # Include the virtual host configurations: Include /etc/apache2/sites-enabled/ what else do I need to do to fix it? Should I be telling apache to listen on 127.0.0.1:80, or isn't it already listening there?

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• Need help setting up OpenLDAP on OSX Mountain Lion

  - by rjcarr

  I'm trying to get OpenLDAP manually configured on OSX Mountain Lion. I'd prefer to do it manually instead of installing OSX server, but if that's the only option (i.e., OpenLDAP on OSX isn't meant to be used without server) then I'll just install it. I've seen guides that mostly just say to change the password in slapd.conf and then start the server and it should work. However, whenever I try to do anything with the client it tells me this: ldap_bind: Invalid credentials (49) I've tried encrypting the password as well as leaving it plain it doesn't seem to matter. The version is 2.4.28 and I've read as of 2.4 OpenLDAP uses slapd.d directories, but that doesn't seem to be the case in OSX. There was mention of an 'olcRootPW' I should use (instead of 'rootpw' in slapd.conf), but I only found that in a file named slapd.ldif. Anyway, I tried setting a password in there but it didn't make a difference). So ... I'm really confused. Has anyone got OpenLDAP working on OSX Moutain Lion without the server tools?

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• Leopard mail.app quoted-printable weirdness

  - by pehrs

  I am not sure if this is a bug in mail.app, or a configuration I just can't find. It might also be a strange sideffect of GPGmail. Mail.app correctly displays all e-mails on my IMAP server, except for the e-mails in my "Sent Messages" folder. In the sent messages folder it messes up åäö, in typical quoted-printable with wrong char-set fashion. They become ‰ˆ. When looking at the source of the e-mails it seems like the header generated by mail.app is correct: Message-Id: <> From: To: In-Reply-To: <> Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Apple-Mail-4--741321197" X-Smtp-Server: smtp.example.com Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v936) Subject: Example subject Date: Fri, 26 Mar 2010 10:14:14 +0100 References: <> X-Pgp-Agent: GPGMail 1.2.0 (v56) This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --Apple-Mail-4--741321197 Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable <Text here with =E5=E4=F6> --Apple-Mail-4--741321197 content-type: application/pgp-signature; x-mac-type=70674453; name=PGP.sig content-description: This is a digitally signed message part content-disposition: inline; filename=PGP.sig content-transfer-encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.12 (Darwin) iEYEARECAAYFAkus62kACgkQlIRLofxhDjYnnwCcDmCXuMGsKlh3a418s12coJgn 36sAoKMdkP3+g/OMK+Ps7AbjQq4Nbqzv =XMko -----END PGP SIGNATURE----- --Apple-Mail-4--741321197-- Thunderbird has no problem displaying the messages. So, how can I get mail.app to use the correct charset?

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• Encryption setup for Linux NAS?

  - by Daniel

  There's a bazillion hard disk encryption HOWTOs, but somehow I can't find one that actually does what I want. Which is: I have a home NAS running Ubuntu, which is being accessed by a Linux and a Win XP client. (Hopefully MacOS X soon...) I want to setup encryption for home dirs on the NAS so that: It does not interfere with the boot process (since the NAS it tucked away in a cupboard), the home dirs should be accessible as a regular file system on the client(s) (e.g. via SMB), it is easy to use by 'normal' people, (so it does not require SSH-ing to the NAS, mount the encrypted partition on command line, then connecting via SMB, and finally umount the partition after being done. I can't explain that to my mom, or in fact to anyone.) does not store the encryption key the NAS itself, encrypts file meta-data and content (i.e. safe against the 'RIAA' attack, where an intruder should not be able to identify which songs are in your MP3 collection). What I hoped to do was use Samba + PAM. The idea was that on connecting to the SMB server, I'd have to enter the password on the client, which sends it to the server for authentication, which would use the password to mount the encrpytion partition, and would unmount it again when the session was closed. Turns out that doesn't really work, because SMB does not transmit the password in the plain and hence I can't configure PAM to use the incoming password to mount the encrypted patition. So... anything I'm overlooking? Is there any way in which I can use the password entered on the client (e.g. on SMB connect) to initiate mounting the encrypted dir on the server?

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• How do I make XTerm not use bold?

  - by mike

  I like using XTerm, I like its default "fixed" font, and I like using terminal colors rather than having a monochromatic terminal. However, XTerm seems to insist on using a bold version of the font whenever it's displaying a bright color: I hate hate hate the bold version of the font, but I like the brightness. The man page seems to suggest that adding "XTerm.VT100.boldMode:false" to my ~/.Xresources would disable this "feature", but it doesn't seem to have any effect. I've had it in there for months, so it's not a rebooting issue. How can I force XTerm to always use the standard, non-bold version of the fixed font, even when it's displaying bright text? Edit: Some have suggested putting "XTerm*boldMode: false" in my ~/.Xresources. That didn't help either. I've confirmed that the changes have taken effect with xrdb, though: $ xrdb -query | grep boldMode XTerm*boldMode: false And if i run xprop and click an xterm, I get "WM_CLASS(STRING) = "xterm", "XTerm"" .. so i'm definitely running real xterms. BTW, this is just a plain-vanilla Ubuntu Intrepid box. If anyone else here is running the same, can you try running: echo -e '#\e[1m#' ...and let me know whether the # on the right has a black pixel in the middle like the one on the left does?

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• How to disable TLS in postfix?

  - by Hamlet

  Hi, How can I disable TLS in postfix? I have problems sending email to a specific host, they said I should disable TLS as I am not using it. Emails are not arriving to indamail.hu ever. Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 220 mail13.indamail.hu ESMTP Apr 6 16:21:15 server postfix/smtp[12059]: > mail13.indamail.hu[91.83.45.53]: EHLO server.xxx.hu Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250-mail13.indamail.hu Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250-STARTTLS Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250-PIPELINING Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250-8BITMIME Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250-SIZE 10485760 Apr 6 16:21:15 server postfix/smtp[12059]: < mail13.indamail.hu[91.83.45.53]: 250 AUTH LOGIN PLAIN CRAM-MD5 Apr 6 16:21:15 server postfix/smtp[12059]: > mail13.indamail.hu[91.83.45.53]: MAIL FROM:<[email protected]> SIZE=2365 BODY=8BITMIME Apr 6 16:21:15 server postfix/smtp[12059]: > mail13.indamail.hu[91.83.45.53]: RCPT TO:<[email protected]> Apr 6 16:21:15 server postfix/smtp[12059]: > mail13.indamail.hu[91.83.45.53]: DATA Apr 6 16:21:15 server postfix/smtp[12059]: send attr reason = lost connection with mail13.indamail.hu[91.83.45.53] while sending MAIL FROM Apr 6 16:21:15 server postfix/smtp[12059]: 70B132188649: to=<[email protected]>, relay=mail13.indamail.hu[91.83.45.53]:25, delay=163321, delays=163319/0.02/1.4/0.04, dsn=4.4.2, status=deferred (lost connection with mail13.indamail.hu[91.83.45.53] while sending MAIL FROM) main.cf contains smtp_use_tls = no smtpd_use_tls = no Thanks, hamlet

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• How to stop Cron from sending messages about errors

  - by Beck

  I have this strange mails comming from cron: Return-Path: <[email protected]> Delivered-To: [email protected] Received: by domain.com (Postfix, from userid 0) id 6F944264D0; Mon, 10 Jan 2011 10:35:01 +0000 (UTC) From: [email protected] (Cron Daemon) To: [email protected] Subject: Cron <root@domain> lynx -dump http://www.domain.com/cron/realqueue Content-Type: text/plain; charset=ANSI_X3.4-1968 X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin> X-Cron-Env: <HOME=/root> X-Cron-Env: <LOGNAME=root> Message-Id: <[email protected]> Date: Mon, 10 Jan 2011 10:35:01 +0000 (UTC) /bin/sh: lynx: not found I have this cron settings in crontab file: SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin */5 * * * * lynx -dump http://www.domain.com/cron/realqueue 17 * * * * root cd / && run-parts --report /etc/cron.hourly 25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ) 47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly ) 52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly ) Lynx is installed on my Ubuntu as well. Ofc in place of domain.com is my domain, just replaced. Thanks ;)

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• Windows XP seemingly out of resources but plenty of free RAM and swap available

  - by Artem Russakovskii

  This one has been bothering me for years and so far I couldn't find an adequate solution. The problem occurs on pretty much every XP install I've done. After opening a variety of programs or the system running existing programs for a while, Windows seemingly runs out of resources, without telling me. There's ALWAYS free RAM. For example, it just happened to me and I had over a gig of free RAM. There are no viruses, spyware, or other nonsense - it is a Windows resource problem, but the question is which resource is it running out of, how does one pinpoint it, and how does one prevent it? Sometimes, this happens after running specific programs - for example, today it happened when I started Photoshop CS4 and Flash CS4 at the same time. I also noticed that restarting The Bat (email client by Ritlabs) seems to get rid of this problem for a while but again, this happens on machines that don't even have The Bat installed. So what does exactly happen? The symptoms are: pressing alt-tab doesn't bring up the list anymore - it just jumps to the next window instantly, very similar to the way Alt-Esc works, however in this case, it's due to not having enough resources to bring up the alt-tab menu random programs would randomly crash, citing random errors, out of memory errors, system resources, inabilities to do system calls, etc. random programs would start missing random parts - for example, Firefox top menus might disappear, pull up partial selections, or not pull up anymore altogether. IE might lose a few of its toolbars. Some programs might fail to redraw or would just plain go gray where the UI used to be. Windows itself never complains about running out of RAM, virtual memory, or anything at all, yet it's running out of something. The only clue I was able to find and apply the fix today was this Desktop Heap Limitation. I haven't confirmed the fix working as not enough time passed. In the meantime, what are everyone's thoughts?

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• Seeking web-based FTP client for very large file upload

  - by Paul M. Nguyen

  I have looked around for these for some time... the limits imposed by the web server and/or the dynamic programming environment (e.g. PHP) are far too restrictive for the application I'm working on. We need to be able to move large graphics and video files to and from clients (ranging from tens of MB to a few GB in a single file). Plain FTP with a proper desktop client will do the trick, and we're hosting this in Amazon EC2 with EBS. User management will be done from the office via webmin. Users are chroot-jailed into their home dir by proftpd. net2ftp will work for many clients, but we often need to move single files that approach 1GB or exceed 2-3GB which is way out of the range of any http-based uploader. So we turn to Java or Flash - can they do it? From within the web browser establish an FTP connection and grab a huge file? There are licensed applets and such out there, but none seem convincing. Again, I'm looking for some code that can speak FTP and read (& write?) the local disk, that is delivered in a web browser, and can move single files of 2GB+. The reason for having a web-based interface to FTP is to skip the software installation step for our clients. I will consider proper desktop client software as long as it's "portable" and at least Win+Mac and can be easily configured by lay-man users in a hurry.

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• Windows 7 Blank Screen on Boot / Login

  - by Greg

  I have a new system that's having a few problems... sometimes (seems to be when the PC is cold, i.e. has been switched off for a while, though that could be my imagination) I get a blank blue screen when I boot up. The system boots normally and auto-logs-in. The desktop loads and I'm even able to launch applications, but then everything disappears and the screen goes to the default windows desktop blue colour (not the desktop image, just a plain blue with no mouse cursor). At this point the machine completely locks up - I'm unable to even toggle Num Lock and have to hold in the power button for 5 seconds to kill it. Interestingly if I manage to launch some applications before it goes blank, they will usually crash... sometimes explorer.exe will crash too. When I reboot, the system is fine and stable. I've installed the latest graphics drivers and run memtest86+ for 6 passes (and counting) with no errors. The system specs are: CPU: Intel I7 2.66 @ 3.4GHz RAM: 6GB (3 * 2GB DDR3) HDD: 128GB Crucial M225 SSD Motherboard: Gigabyte EX58-UD3R Gfx: ATI Radeon Sapphire 5870 1GB Note: There are a few similar questions but I haven't found one that matches my symptoms

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• Apt pin and self hosted apt repo

  - by Hamish Downer

  We have our own apt/deb repository with a handful of packages where we want to control the version. Crucially this includes puppet, which can be sensitive to versions being different. I want our desktops to only get puppet from our repository, but also for people to be able to add their own PPAs, enable backports etc. The current problem we have is backports on Ubuntu Lucid. Some important lines from /etc/apt/sources.list: deb http://gb.archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse deb http://gb.archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse deb http://gb.archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse deb http://deb.example.org/apt/ubuntu/lucid/ binary/ And in /etc/apt/preferences.d/puppet: Package: puppet puppet-common Pin: release a=binary Pin-Priority: 800 Package: puppet puppet-common Pin: release a=lucid-backports Pin-Priority: -10 Currently policy says: $ sudo apt-cache policy puppet puppet: Installed: (none) Candidate: (none) Package pin: 2.7.1-1ubuntu3.6~lucid1 Version table: 2.7.1-1ubuntu3.6~lucid1 -10 500 http://gb.archive.ubuntu.com/ubuntu/ lucid-backports/main Packages 100 /var/lib/dpkg/status 2.6.14-1puppetlabs1 -10 500 http://deb.example.org/apt/ubuntu/lucid/ binary/ Packages 0.25.4-2ubuntu6.8 -10 500 http://gb.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages 500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages 0.25.4-2ubuntu6 -10 500 http://gb.archive.ubuntu.com/ubuntu/ lucid/main Packages If I use n= instead of a= then I get Package pin: (not found) I'm just plain confused at this point as to what I should use. Any help appreciated.

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• Name one good reason for immediately failing on a SMTP 4xx code

  - by Avery Payne

  I'm really curious about this. The question (highlighed in bold): Can someone name ONE GOOD REASON to have their email server permanently set up to auto-fail/immediate-fail on 4xx codes? Because frankly, it sounds like "their" setups are broken out-of-the-box. SMTP is not Instant Messaging. Stop treating it like IRC or Jabber or MSN or insert-IM-technology-here. I don't know what possesses people to have the "IMMEDIATE DELIVERY OR FAIL" mentality with SMTP setups, but they need to stop doing that. It just plain breaks things. Every two or three years, I stumble into this. Someone, somewhere, has decided in their infinite wisdom that 4xx codes are immediate failures, and suddenly its OMGWTFBBQ THE INTARNETZ ARE BORKEN, HALP SKY IS FALLING instead of "oh, it'll re-attempt delivery in about 30 minutes". It amazes me how it suddenly becomes "my" problem that a message won't go through, because someone else misconfigured "their" SMTP service. IF there is a legitimate reason for having your server permanently set up in this manner, then the first good answer will get the check. IF there is no good reason (and I suspect there isn't), then the first good-sounding-if-still-logically-flawed answer will get the check.

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• What's the state of the art in image upscaling?

  - by monov

  I like to collect cool pics and use them as wallpapers or for other things. Often, artists publish only low-res versions, probably for fear of theft. Example: Gabriel Pulecio's BIRDS Now, if I want to use that as a wallpaper, I'd have to upscale it, and obviously that'd make it look blurry because of the bicubic interpolation. I realize there's no real way to get a high-res version from a low-res pic, because the information is not simply there. That said, I'm wondering if heuristics have been developed for upscaling with less apparent loss of quality. Those would probably be optimized for specific image types. For photorealistic pictures, for cartoons with large flat areas, for pixel art... One algorithm I'm aware of is Seam Carving. It works for some kinds of pics, especially ones with a plain, undetailed or uninteresting background, and a subject that strongly stands out. But it's far from being general-purpose. Applying it to the above pic produces this. It looks quite sharp, but the proportions are horribly distorted because the algorithm is not designed for this kind of pic. Another is Pixel art scaling algorithms. Those are completely unfit for anything other than actual pixel art that's pixelized to begin with. For example, I tried the scale2x windows binary on my pic, but its output was nearly indistinguishable from nearest-neighbour scaling because the algorithm didn't detect any isolated pixely fragments to work from. Something else I tried was: I enlarged the image in Photoshop with bicubic interpolation, then I applied unsharp mask. The result looks pretty bad. The red blotch is actually resized reasonably well, but the dove is far from it. What I'm looking for is some app that makes a best-effort attempt at upscaling any input image while minimizing blurriness. If you know of any, I'll be thankful. Note that the subjective prettiness and sharpness of the result is what matters... the result doesn't need to be completely faithful to the original small image.

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• Failed loading ioncube

  - by time

  I recently upgraded a small server to Ubuntu 12.10 (from 12.04), thus upgrading PHP from 5.3 to 5.4. However, I'm getting this in root's mailbox several times a day: Subject: Cron <root@xxxxxxx> [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -ignore_readdir_race -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete Content-Type: text/plain; charset=ANSI_X3.4-1968 X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <HOME=/root> X-Cron-Env: <PATH=/usr/bin:/bin> X-Cron-Env: <LOGNAME=root> Message-Id: xxxxxxxxxxxxxxxxxxxxxxxx Date: Sun, 9 Dec 2012 05:09:02 -0500 (EST) Failed loading /usr/lib/php5/20090626+lfs/ioncube_loader_lin_5.3.so: /usr/lib/php5/20090626+lfs/ioncube_loader_lin_5.3.so: undefined symbol: php_body_write I assume that's coming up because it's for PHP 5.3. How can I just get rid of ioncube? I have no need for it, I don't even remember installing it. That .so file doesn't exist, and I've grep'd several locations for "ioncube" and I can't seem to figure how to stop that message from flooding the mailbox.

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• File corruption after copying files in Windows 7 64 bit using two methods

  - by DustByte

  I have 5000 pictures and other files in a directory taking up 35 GB. I want to duplicate this directory. Method 1: I do a simple copy and paste of the directory in explorer. I have the habit of checking the checksums after copying important files. In this case I noticed that around 2000 files failed the MD5 test. At a closer inspection of a randomly chosen JPEG with different checksums it turns out that some XMP metadata had changed. In particular, the tag <MicrosoftPhoto:DateAcquired> had changed the date from 2009 to today (possibly around the time I was copying the files). I have no idea what triggered this XMP data to be changed and exactly when it was changed and why for these particular files, but at least it seems to explain the checksum discrepancy. Method 2: As I want the exact files to be duplicated, I tried the program FreeFileSync to mirror the directory, hoping no XMP metadata would mysteriously change. A checksum test in addition to a thorough file comparison test in FreeFileSync lead to two similar but yet different results: 31 files fail the checksum test, 23 files fail the file comparison test. The smaller set is not entirely contained in the bigger set, although many files occur in both. What is alarming here is that not only JPEGs are flagged as altered but also som AVIs, MPGs and a large 7-zip file. Closer inspection of a JPEG indicates that it is indeed corrupt: the bottom half of the picture is simply plain gray. Due to the size of the 7-zip file, I have not been able to pin down the discrepancy. Note, in both methods, every file has its correct file size after being copied. Question: Any thoughts on what is possibly going on here? I have never had this problem before, and I am now terrified that files get corrupted after simple actions like copy/paste and file sync. Even if I manage to successfully copy the files somehow, I would still like an explanation to this.

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• Securing bash scripts

  - by minnur

  Hi There, Does anybody know what is the best way to secure bash scripts. I have a script which creates database and source code backup and ftp it to other server. And login/password for destination ftp are plain text. I need somehow encrypt it or hide it in case of website hacking. Or should i create script written on C to create bash file then run it and delete ? Thanks. Thanks for the answers and I am sorry, i wasn't clear enough. I would like to clarify my question in the following items. We are storing the data in Rackspace Cloud files. We can't pull as Cloud files doesn't allow you run a script. We can write the script to run on Server A and pull FTP and MySQL data on servers B, C, D, etc. And we want to protect the passwords on A from the situation where A is hacked. Can we compile our script file to hide them? Thanks

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• Better approach to archiving large amounts of original video footage using optical media (DVD/Blu-ra

  - by Rob

  This question is to share my experience as well as ask for suggestions for better methods. Along with 2 friends, I completed the making of a short documentary film in 2006. Clip is at: http://www.youtube.com/mediamotioninvision The film was edited in Adobe Premiere Pro 1.5 on Windows XP. More details and screenshot here: http://www.flickr.com/photos/smilingrobbie/1350235514/ ( note this is not intended to be a plug, we've moved on from this initial learning curve project ;) ) The film is in 4:3 standard definition 720x576 PAL format. As well as retaining the final 30minute film, I wanted to keep all original files that assembled together to make the film. The footage was 83.5Gb So I archived them to over 20 4.7Gb DVD recordables in the original .avi format (i.e. data DVD-ROM format, NOT DVD-Video Mpeg2) Some .avi DV video files were larger than 4.7Gb so I used 7-zip to split them ( here is a guide as to how to do that: http://www.linglom.com/2008/10/12/how-to-split-a-large-file-using-7-zip/ ) To recombine them, a dos shell command like this would do that: copy /b file.avi.* file.avi would do the job, where .* is a wild card to include all the split parts e.g. 001, 002...00n assuming they are all in the same directory path folder. file.avi is the recombined file identical to the original. Later on, I bought a LG BE06 LU10 USB 2.0 Super-multi Blu-ray burner and archived the footage to 2 (two) x 50Gb BD-R DL discs. Again in the original format, written as files to a BD-R in the BD-R BD-ROM UDF format readable by PC/Mac etc, NOT Blu-ray video/film format. This seems to be a good solution for me, because: the archive is in a robust, reasonably permanent, non-volatile medium, i.e. DVD recordable / Blu-ray (debates about stability of optical media organic chemical dye compounds/substrates aside) the format of the archive is accessible by open source tools or just plain Windows Explorer and it's not in a proprietary format I just thought I'd ask folks for their experience on better methods, if such exist.

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• Procmail Postfix issue

  - by Blucreation

  Our server is using CENTOS uses postfix: Nov 1 11:31:52 webserver postfix/smtpd[30424]: 822A91872F: client=unknown[5.133.168.42], sasl_method=PLAIN, [email protected] Nov 1 11:31:52 webserver postfix/cleanup[30427]: 822A91872F: message-id=<[email protected]> Nov 1 11:31:52 webserver postfix/qmgr[1067]: 822A91872F: from=<[email protected]>, size=620, nrcpt=1 (queue active) Nov 1 11:31:52 webserver postfix/virtual[30505]: 822A91872F: to=<[email protected]>, relay=virtual, delay=0.12, delays=0.12/0/0/0, dsn=2.0.0, status=sent (delivered to maildir) Nov 1 11:31:52 webserver postfix/qmgr[1067]: 822A91872F: removed Nov 1 11:31:52 webserver postfix/smtpd[30424]: disconnect from unknown[5.133.168.42] I have this in my etc/postfix/main.cf: mailbox_command = /usr/bin/procmail -a "$EXTENSION" My etc/procmailrc contains: PATH="/usr/bin" SHELL="/bin/bash" LOGFILE="/var/log/procmail.log" VERBOSE="YES" LOG="#TEST#" I don't think procmail is picking up on my procmailrc as nothing ever gets logged from normal emails. If i type this: procmail DEFAULT=/dev/null VERBOSE=yes LOGFILE=/var/log/procmail.log /dev/null </dev/null I get entries in my log file so i know procmail is working Am i doing something wrong? am i missing something? I eventually want my rule to call a php script only if the subject contains "SUPPORT TICKET" and the to is "[email protected]" but that's once i this issue solved.

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• Nginx with http/https - Http seemed redirected to https all the time

  - by dwarfy

  I've this really weird behaviour with my ubuntu 10.04 / nginx 1.2.3 server. Basically I changed the SSL certificates this morning. And ever since it has been behaving weirdly on all apps. Godaddy is reporting that HTTPS/SSL setup is correct. When I try a page it still works correctly when I'm using HTTPS. But when I try using HTTP nginx reports error : 400 Bad Request The plain HTTP request was sent to HTTPS port After looking around on google for hours, I've tried different setup (while originaly my setup was working correctly for longtime, I just renewed certificates) I kindof found a half solution by adding this to my config : error_page 497 $request_uri; The realllly weird thing is that when I use this setup : server { listen 80; server_name john.johnrocks.eu; access_log /home/john/envs/john_prod/nginx_access.log; error_log /home/john/envs/john_prod/nginx_error.log; location / { uwsgi_pass unix:///home/john/envs/john_prod/john.sock; include uwsgi_params; } location /media { alias /home/john/envs/john_prod/johntab/www; } location /adminmedia { alias /home/john/envs/john_prod/johntab/www/adminmedia; } } I still have the same error when using HTTP (while nothing is setup for HTTPS here)?? I'm getting crazy on this !

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• Windows Task Scheduler fails at sending e-mail

  - by Marki

  The error is 2147746321. I can see in the mailserver log that it tries, but the connection gets closed. Wed 2012-10-10 15:55:25: Session 990590; child 1 Wed 2012-10-10 15:55:25: Accepting SMTP connection from [x:49161] to [y:25] Wed 2012-10-10 15:55:25: --> 220 Mdaemon; Wed, 10 Oct 2012 15:55:25 +0200 Wed 2012-10-10 15:55:25: <-- EHLO x Wed 2012-10-10 15:55:25: --> 250-Hello x, pleased to meet you Wed 2012-10-10 15:55:25: --> 250-VRFY Wed 2012-10-10 15:55:25: --> 250-EXPN Wed 2012-10-10 15:55:25: --> 250-ETRN Wed 2012-10-10 15:55:25: --> 250-AUTH LOGIN Wed 2012-10-10 15:55:25: --> 250-8BITMIME Wed 2012-10-10 15:55:25: --> 250 SIZE 20971000 Wed 2012-10-10 15:55:25: <-- AUTH LOGIN Wed 2012-10-10 15:55:25: --> 334 VX...... Wed 2012-10-10 15:55:25: Connection closed Wed 2012-10-10 15:55:25: SMTP session terminated (Bytes in/out: 26/212) Googling does not reveal much except that it indeed "doesn't work" and Exchange pops up all over the place. This is no Exchange server. I just want a plain and straight SMTP connection to work. How? (I have tried running the task as normal user and as system account, no difference.)

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• What could cause the file command in Linux to report a text file as data?

  - by Jonah Bishop

  I have a couple of C++ source files (one .cpp and one .h) that are being reported as type data by the file command in Linux. When I run the file -bi command against these files, I'm given this output (same output for each file): application/octet-stream; charset=binary Each file is clearly plain-text (I can view them in vi). What's causing file to misreport the type of these files? Could it be some sort of Unicode thing? Both of these files were created in Windows-land (using Visual Studio 2005), but they're being compiled in Linux (it's a cross-platform application). Any ideas would be appreciated. Update: I don't see any null characters in either file. I found some extended characters in the .cpp file (in a comment block), removed them, but file still reports the same encoding. I've tried forcing the encoding in SlickEdit, but that didn't seem to have an effect. When I open the file in vim, I see a [converted] line as soon as I open the file. Perhaps I can get vim to force the encoding?

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• Issue with SSL using HAProxy and Nginx

  - by Ben Chiappetta

  I'm building a highly available site using a multiple HAProxy load balancers, Nginx web serves, and MySQL servers. The site needs to be able to survive load balancer or web servers nodes going offline without any interruption of service to visitors. Currently, I have two boxes running HAProxy sharing a virtual IP using keepalived, which forward to two web servers running Nginx, which then tie into two MySQL boxes using MySQL replication and sharing a virtual IP using heartbeat. Everything is working correctly except for SSL traffic over HAProxy. I'm running version 1.5 dev12 with openssl support compiled in. When I try to navigate to the virtual IP for haproxy over https, I get the message: The plain HTTP request was sent to HTTPS port. Here's my haproxy.cfg so far, which was mainly assembled from other posts: global log 127.0.0.1 local0 log 127.0.0.1 local1 notice # log 127.0.0.1 local0 user haproxy group haproxy daemon maxconn 20000 defaults log global option dontlognull balance leastconn clitimeout 60000 srvtimeout 60000 contimeout 5000 retries 3 option redispatch listen front bind :80 bind :443 ssl crt /etc/pki/tls/certs/cert.pem mode http option http-server-close option forwardfor reqadd X-Forwarded-Proto:\ https if { is_ssl } reqadd X-Proto:\ SSL if { is_ssl } server web01 192.168.25.34 check inter 1s server web02 192.168.25.32 check inter 1s stats enable stats uri /stats stats realm HAProxy\ Statistics stats auth admin:********* Any idea why SSL traffic isn't being passed correctly? Also, any other changes you would recommend? I still need to configure logging, so don't worry about that section. Thanks in advance your help.

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• HTTP responses curl and wget different results

  - by Fab

  To check HTTP response header for a set of urls I send with curl the following request headers foreach ( $urls as $url ) { // Setup headers - I used the same headers from Firefox version 2.0.0.6 $header[ ] = "Accept: text/xml,application/xml,application/xhtml+xml,"; $header[ ] = "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; $header[ ] = "Cache-Control: max-age=0"; $header[ ] = "Connection: keep-alive"; $header[ ] = "Keep-Alive: 300"; $header[ ] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7"; $header[ ] = "Accept-Language: en-us,en;q=0.5"; $header[ ] = "Pragma: "; // browsers keep this blank. curl_setopt( $ch, CURLOPT_URL, $url ); curl_setopt( $ch, CURLOPT_USERAGENT, 'Googlebot/2.1 (+http://www.google.com/bot.html)'); curl_setopt( $ch, CURLOPT_HTTPHEADER, $header); curl_setopt( $ch, CURLOPT_REFERER, 'http://www.google.com'); curl_setopt( $ch, CURLOPT_HEADER, true ); curl_setopt( $ch, CURLOPT_NOBODY, true ); curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true ); curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true ); curl_setopt( $ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY ); curl_setopt( $ch, CURLOPT_TIMEOUT, 10 ); //timeout 10 seconds } Sometimes I receive 200 OK which is good other time 301, 302, 307 which I consider good as well, but other times I receive weird status as 406, 500, 504 which should identify an invalid url but when I open it on the browser they are fine for example the script returns http://www.awe.co.uk/ => HTTP/1.1 406 Not Acceptable and wget returns wget http://www.awe.co.uk/ --2011-06-23 15:26:26-- http://www.awe.co.uk/ Resolving www.awe.co.uk... 77.73.123.140 Connecting to www.awe.co.uk|77.73.123.140|:80... connected. HTTP request sent, awaiting response... 200 OK Does anyone know which request header I am missing or adding in excess?

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