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• Munin email notification

  - by Prashanth

  I am trying to get munin to notify me via email. I have configured munin and it reports critical and warning values but no alerts are being sent neither is any script being called. Can you please help me out with this? I have included part of the munin.conf below # Drop [email protected] and [email protected] an email everytime # something changes (OK -> WARNING, CRITICAL -> OK, etc) #contact.someuser.command mail -s "Munin notification" [email protected]\ contact.prashanth.command echo "Munin notification" | sendmail -t [email protected] contact.prashanth.always_send warning critical contact.root.command echo "Munin notification" | sendmail -t [email protected] contact.root.always_send warning critical contact.pipevia.command | /home/prashanth/script.sh /home/prashanth/script.sh None of this works. What am i missing here and why are emails not being sent? Thanks in advance. here is the munin-limits.log 2011/09/26 14:58:12 Opened log file 2011/09/26 14:58:12 [INFO] Starting munin-limits, getting lock /var/run/munin/munin-limits.lock 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 722. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 725. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 740. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 754. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 759. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $text in length at /usr/share/perl5/Munin/Master/LimitsOld.pm line 774. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $res[3] in join or string at /usr/share/perl5/Munin/Master/LimitsOld.pm line 777. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 722. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 725. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 740. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 754. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 759. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $text in length at /usr/share/perl5/Munin/Master/LimitsOld.pm line 774. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $res[15] in join or string at /usr/share/perl5/Munin/Master/LimitsOld.pm line 777. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 722. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 725. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 740. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 754. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 759. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $text in length at /usr/share/perl5/Munin/Master/LimitsOld.pm line 774. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $res[1] in join or string at /usr/share/perl5/Munin/Master/LimitsOld.pm line 777. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 722. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 725. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 740. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 754. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $a[0] in pattern match (m//) at /usr/share/perl5/Munin/Master/LimitsOld.pm line 759. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $text in length at /usr/share/perl5/Munin/Master/LimitsOld.pm line 774. 2011/09/26 14:58:12 [PERL WARNING] Use of uninitialized value $res[1] in join or string at /usr/share/perl5/Munin/Master/LimitsOld.pm line 777. 2011/09/26 14:58:12 Baz? 2011/09/26 14:58:12 [INFO] munin-limits finished (0.02 sec) 2011/09/26 14:58:12 Command "prashanth" stderr: Munin notification - this is a test mail from the user prashanth | sendmail -t [email protected]

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• Load balancing with rsync

  - by David

  i have 2 server with public ip: SERVER A - 10.10.10.11 SERVER B - 10.10.10.12 both of them are centos 6 in OS, installed nginx with php-fpm, 2 exact same website stored at: /var/www/html. Domain with: myxdomain.com and dns hosted with cloudflare ( since cloudflare do support round robin ) to point the domain to A record of 10.10.10.11 and 10.10.10.12. I know that round robin dns does not cover the failover or fallover, but it does not matter, what i need is: How do i sync the both content of /var/www/html server A and server B to be exactly same? Lets say: 1) user uploaded their file to server A, the file content will be sync to server B as well. 2) user uploaded their file to server B, the file content will be sync to server A as well. rsync will be good choice here? Any example of command line and cronjob time that suitable? thanks

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• Protect Gnome Screen Saver Settings

  - by Jared Brown

  By default in Gnome standard users can access their screensaver preferences and change settings such as the idle time and whether or not it locks the screen. I desire to set the screensaver settings as the root user for each user and only allow the root user to adjust them. What is the best (read: simplest + fool proof) way to accomplish this?

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• wpa_supplicant: how do you connect to a particular essid from a script?

  - by Veek.M

  network={ ssid="ana" bssid=xx:xx:xx:xx:xx:xx key_mgmt=NONE auth_alg=OPEN wep_key0=xxxxxxxxxxxxx #identity 0 ana disabled=1 } How do i modify this to support connecting via a script by manually doing: dial ana or dial gremlin Right now, when I start wpa_supplicant, it autoconnects based on priority or disabled and I'd like to turn that behavior off and manually specify the ESSID I want.

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• PHP make install seems to end abruptly and does not update libphp5.so

  - by matt74tm

  I'm trying to compile PHP 5.3.3 and after a lot of ups and downs, I finally did 'make' it followed by 'make install' which just shows this: root@server [/tmp/php-5.3.3]# make install Installing PHP SAPI module: cgi Installing PHP CGI binary: /usr/bin/ Installing PHP CLI binary: /usr/bin/ Installing PHP CLI man page: /usr/share/man/man1/ Installing shared extensions: /usr/lib64/20090626/ Installing build environment: /usr/lib64/build/ Installing header files: /usr/include/php/ Installing helper programs: /usr/bin/ program: phpize program: php-config Installing man pages: /usr/share/man/man1/ page: phpize.1 page: php-config.1 /tmp/php-5.3.3/build/shtool install -c ext/phar/phar.phar /usr/bin ln -s -f /usr/bin/phar.phar /usr/bin/phar Installing PDO headers: /usr/include/php/ext/pdo/ It does not look like its done, because /usr/lib64/httpd/modules/libphp5.so still shows an old date: -rwxr-xr-x 1 root root 3193768 Mar 31 2010 libphp5.so

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• Networking lost after update from Debian Wheezy to Jessie

  - by Charaf

  I am currently setting a Virtual Machine for development purposes. I did a big part of this configuration under Wheezy, but I need some debs that were available only on Jessie. So, I've updated the sources.list and did a dist-upgrade. Everything went well, but after the reboot, I noticed that I lost all the networking. Repositories are unreachable, as well as a simple ping google.fr returns nothing. What can I do to quickly restore networking so that I can continue my working. I have a poor connexion and can not afford to download the whole install DVDs. root@vm~# ifconfig lo Link encap:Boucle locale inet adr:127.0.0.1 Masque:255.0.0.0 adr inet6::1/128 Scope:Hôte UP LOOPBACK RUNNING MTU:65536 Metric 1 RX packets:452 errors:0 dropped:0 overruns:0 frame:0 TX packets:452 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:0 RX bytes:164238 (160.3 KiB) TX bytes:164238 (160.3 KiB) root@vm~# I am running VMware 1.0.1 build 1379776 and the last update of Jessie (debian 3.14.4-1) Please help. Thanks.

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• How to upgrade XBMC Live from 9.04.1 to 9.11 via command line?

  - by sunpech

  I've been unable to do a fresh install of XBMC Live 9.11 to my hard drive. Everytime it fails at the Install System step. But I am able to get XBMC Live 9.04.1 to install successfully. How do I upgrade XBMC Live 9.04.1 to 9.11? I understand that Ctrl+Shift+F2 brings up the command line, but what are the next set of commands to run?

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• Error with Apache2 on Debian Lenny: "Could not reliably determine the server's fully qualified domai

  - by user40245

  I installed apache2 in Debian Lenny but when I give the command sudo /etc/init.d/apache2 reload it gives me a statement saying "Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName". How can I change the server name? And how can I make it accessible from another system?

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• Editing Exim's Banner

  - by Tiffany Walker

  Is there a way to place EXIM smtp banner on 1 line instead of 3 lines? The banner starts with 220. I've been searching but can not find a way. under /etc/exim.conf I have #todd host's smtp_banner = "${primary_hostname} ESMTP Exim ${version_number} \ \#${compile_number} ${tod_full} \n\ We do not authorize the use of this system to transport unsolicited, \n\ and/or bulk e-mail." do i make that one line?

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• Connect two subnets without router

  - by Shcheklein

  I got two Comcast routers with two different subnets on each. Every subnet contains 5 static IPs. Two questions: Are there any problems if both routers and machines from both subnets are connected into one switch? Security issues doesn't matter there. I need to know if there are some performance or other problems. Is it possible to make machines from different subnets to see each other if they all are connected into one switch? Some static routing, add ARP records or somethig else ... I just want to avoid configuring second ethernet adaptors, third router or something. And I need to connect these subnets vai high-speed local network.

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• Connecting to server from remote machine

  - by Jannat Arora

  I wish to connect my machine to a server in some other city. For doing the same I am using the following command: mstsc -v ip_address_of_server remote desktop can't connect to remote computer for one of these reasons: 1) Remote access to server is not enabled. 2) Remote computer is turned off 3) Remote computer is not available on network. Make sure remote computer is turned on and connected to the network, and that remote access is enabled. As per previous posts I need to turn off my client computers firewall..which I have...but still it gives me the same message. Can someone please please help me out...so as to how i may resolve this?? I am really new to networking, etc. Also when i am pinging: ping ip_address_of server I am getting the following response: Reply from ip_address_of_server: destination host unreachable Also I did try on ubuntu with rdesktop...still its not been able to connect with it. Also i know there are other people who are able to connect their machines with the server remotely. So i guess its not working for me only. Also when I accessed the same machine through LAN I was able to do so.

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• How to restore default iPod playlists on Amarok?

  - by obvio171

  I wanted to "reset" the collection on my iPod and ended up accidentally deleting, through Amarok, all the playlists, including the default ones like "Most Played" and "Highest Rated". Since these are dynamic playlists with a special meaning for iPod, I don't think creating new, normal playlists with the same name will bring their special behavior back. How do I restore them with the same dynamic functionality? Is there a way to do that on Amarok? Rhythmbox? GTKPod? Command line? P.S.: not entirely sure what the policy about iPod questions are, but this one in particular seems to me to be very computer-related because, although it's about interfacing with a device, everything has to be done on my computer, using standard PC libraries/programs, etc. If it's still off-topic, please point me to where I could post it.

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• Forensic Analysis of the OOM-Killer

  - by Oddthinking

  Ubuntu's Out-Of-Memory Killer wreaked havoc on my server, quietly assassinating my applications, sendmail, apache and others. I've managed to learn what the OOM Killer is, and about its "badness" rules. While my machine is small, my applications are even smaller, and typically only half of my physical memory is in use, let alone swap-space, so I was surprised. I am trying to work out the culprit, but I don't know how to read the OOM-Killer logs. Can anyone please point me to a tutorial on how to read the data in the logs (what are ve, free and gen?), or help me parse these logs? Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 1, exc 2326 0 goal 2326 0... Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 1 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 1, exc 2326 0 red 61795 745 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 2, exc 122 0 goal 383 0... Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 1 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 2, exc 383 0 red 61795 745 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 2 Apr 20 20:03:27 EL135 kernel: OOM killed process watchdog (pid=14490, ve=13516) exited, free=43104 gen=24501. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=4457, ve=13516) exited, free=43104 gen=24502. Apr 20 20:03:27 EL135 kernel: OOM killed process ntpd (pid=10816, ve=13516) exited, free=43104 gen=24503. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=27401, ve=13516) exited, free=43104 gen=24504. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=29009, ve=13516) exited, free=43104 gen=24505. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=10557, ve=13516) exited, free=49552 gen=24506. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=24983, ve=13516) exited, free=53117 gen=24507. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=29129, ve=13516) exited, free=68493 gen=24508. Apr 20 20:03:27 EL135 kernel: OOM killed process sendmail-mta (pid=941, ve=13516) exited, free=68803 gen=24509. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=12418, ve=13516) exited, free=69330 gen=24510. Apr 20 20:03:27 EL135 kernel: OOM killed process python (pid=22953, ve=13516) exited, free=72275 gen=24511. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=6624, ve=13516) exited, free=76398 gen=24512. Apr 20 20:03:27 EL135 kernel: OOM killed process python (pid=23317, ve=13516) exited, free=94285 gen=24513. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=29030, ve=13516) exited, free=95339 gen=24514. Apr 20 20:03:28 EL135 kernel: OOM killed process apache2 (pid=20583, ve=13516) exited, free=101663 gen=24515. Apr 20 20:03:28 EL135 kernel: OOM killed process logger (pid=12894, ve=13516) exited, free=101694 gen=24516. Apr 20 20:03:28 EL135 kernel: OOM killed process bash (pid=21119, ve=13516) exited, free=101849 gen=24517. Apr 20 20:03:28 EL135 kernel: OOM killed process atd (pid=991, ve=13516) exited, free=101880 gen=24518. Apr 20 20:03:28 EL135 kernel: OOM killed process apache2 (pid=14649, ve=13516) exited, free=102748 gen=24519. Apr 20 20:03:28 EL135 kernel: OOM killed process grep (pid=21375, ve=13516) exited, free=132167 gen=24520. Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 4, exc 4215 0 goal 4826 0... Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): task ede29370, thg df98b880, sig 1 Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 4, exc 4826 0 red 189481 331 Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): task ede29370, thg df98b880, sig 2 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 5, exc 3564 0 goal 3564 0... Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): task c6c90110, thg cdb1a100, sig 1 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 5, exc 3564 0 red 189481 331 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): task c6c90110, thg cdb1a100, sig 2 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 6, exc 8071 0 goal 8071 0... Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): task d7294050, thg c03f42c0, sig 1 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 6, exc 8071 0 red 189481 331 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): task d7294050, thg c03f42c0, sig 2 Watchdog is a watchdog task, that was idle; nothing in the logs to suggest it had done anything for days. Its job is to restart one of the applications if it dies, so a bit ironic that it is the first to get killed. Tail was monitoring a few logs files. Unlikely to be consuming memory madly. The apache web-server only serves pages to a little old lady who only uses it to get to church on Sundays a couple of developers who were in bed asleep, and hadn't visited a page on the site for a few weeks. The only traffic it might have had is from the port-scanners; all the content is password-protected and not linked from anywhere, so no spiders are interested. Python is running two separate custom applications. Nothing in the logs to suggest they weren't humming along as normal. One of them was a relatively recent implementation, which makes suspect #1. It doesn't have any data-structures of any significance, and normally uses only about 8% of the total physical RAW. It hasn't misbehaved since. The grep is suspect #2, and the one I want to be guilty, because it was a once-off command. The command (which piped the output of a grep -r to another grep) had been started at least 30 minutes earlier, and the fact it was still running is suspicious. However, I wouldn't have thought grep would ever use a significant amount of memory. It took a while for the OOM killer to get to it, which suggests it wasn't going mad, but the OOM killer stopped once it was killed, suggesting it may have been a memory-hog that finally satisfied the OOM killer's blood-lust.

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• Permissions problems with Apache / SVN

  - by Fred Wuerges

  I am installed a SVN server (v1.6) on a VPS contracted with CentOS 5, Apache 2.2 with WHM panel. I installed and configured all necessary modules and am able to create and access repositories via my web browser normally. The problem: I can not commit or import anything, always return permission errors: First error: Can not open file '/var/www/svn/test/db/txn-current-lock': Permission denied After fix the previous error: Can't open '/var/www/svn/test/db/tempfile.tmp': Permission denied And other... (and happends many others) Can't open file '/var/www/svn/test/db/txn-protorevs/0-1m.rev': Permission denied I've read and executed permissions on numerous tutorials regarding this errors, all without success. I've defined the owner as apache or nobody and different permissions for folders and files. I'm using TortoiseSVN to connect to the server. Some information that may find useful: I'm trying to perform commit through an external HTTP connection, like: svn commit http://example.com/svn/test SELinux is disabled. sestatus returns SELinux status: disabled Running the command to see the active processes of Apache, some processes are left with user/group "nobody". I tried changing the settings of Apache to not run with that user/group, but all my websites stopped working, returning this error: Forbidden You don't have permission to access / on this server. Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request. Apache process list: root@vps [/var/www]# ps aux | egrep '(apache|httpd)' root 19904 0.0 4.4 133972 35056 ? Ss 16:58 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20401 0.0 3.5 133972 27772 ? S 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL root 20409 0.0 3.4 133972 27112 ? S 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20410 0.0 3.8 190040 30412 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20412 0.0 3.9 190344 30944 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20414 0.0 4.4 190160 35364 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20416 0.0 4.0 190980 32108 ? Sl 17:01 0:00 /usr/local/apache/bin/httpd -k start -DSSL nobody 20418 0.3 5.3 263028 42328 ? Sl 17:01 0:12 /usr/local/apache/bin/httpd -k start -DSSL root 32409 0.0 0.1 7212 816 pts/0 R+ 17:54 0:00 egrep (apache|httpd) SVN folder permission var/www/: drwxrwxr-x 3 apache apache 4096 Dec 11 16:41 svn/ Repository permission var/www/svn/: drwxrwxr-x 6 apache apache 4096 Dec 11 16:41 test/ Internal folders of repository var/www/svn/test: drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 conf/ drwxrwxr-x 6 apache apache 4096 Dec 11 16:41 db/ -rwxrwxr-x 1 apache apache 2 Dec 11 16:41 format* drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 hooks/ drwxrwxr-x 2 apache apache 4096 Dec 11 16:41 locks/ -rwxrwxr-x 1 apache apache 229 Dec 11 16:41 README.txt*

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• Can't write to raid on Fedora

  - by 99miles

  I just did a fresh install of Fedora 11 and added Raid 1 following this tutorial: http://www.optimiz3.com/installing-fedora-11-and-setting-up-a-raid-0-1-5-6-or-10-array/ Now I see the filesystem when I open 'Computer' in the GUI, and I open it and see 'lost+found', but i can't write to the drive. The option is simply greyed out. And when I view Properties on the drive and go to Permissions, it says 'The permissions of {driveid} could not be determined.' Any ideas?

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• RTNETLINK answers: Invalid argument

  - by LinuxPenseur

  When my system boots up it shows the following message. Bringing up loopback interface: [ OK ] Bringing up interface eth0: RTNETLINK answers: Invalid argument [ OK ] Bringing up interface eth1: RTNETLINK answers: Invalid argument [ OK ] Bringing up interface eth2: RTNETLINK answers: Invalid argument [ OK ] Bringing up interface eth3: RTNETLINK answers: Invalid argument [ OK ] Why is this happening. Normally it does not give the message RTNETLINK answers: Invalid argument I did ifconfig and the output is eth0 Link encap:Ethernet HWaddr 00:00:50:6D:56:B4 inet addr:120.0.10.137 Bcast:120.0.255.255 Mask:255.255.255.0 inet6 addr: fe80::200:50ff:fe6d:56b4/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:3 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:214 (214.0 b) Base address:0xa000 eth1 Link encap:Ethernet HWaddr 00:00:50:6D:56:B5 inet addr:121.0.10.137 Bcast:121.0.255.255 Mask:255.255.255.0 inet6 addr: fe80::200:50ff:fe6d:56b5/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:3 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:214 (214.0 b) Base address:0xc000 eth2 Link encap:Ethernet HWaddr 00:00:50:6D:56:B6 inet addr:128.0.10.137 Bcast:128.0.255.255 Mask:255.255.255.0 inet6 addr: fe80::200:50ff:fe6d:56b6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1006 (1006.0 b) TX bytes:396 (396.0 b) Interrupt:16 eth3 Link encap:Ethernet HWaddr 00:00:50:6D:56:B7 inet addr:123.0.10.137 Bcast:123.0.255.255 Mask:255.255.255.0 inet6 addr: fe80::200:50ff:fe6d:56b7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:10 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:728 (728.0 b) TX bytes:396 (396.0 b) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:14 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:980 (980.0 b) TX bytes:980 (980.0 b) What could be the reason for the message and how to change this to normal? Thanks

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• Recompiling yum installation

  - by Saif Bechan

  I have installed Nginx using yum. Now to add modules to the existing installation i have to recompile Nginx from source. How can i recompile a yum installation. There is no source. Should I uninstall the yum package, and then download the source package and recompile it with the module and then install everything and reconfigure it again???

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• Does smbfs create constant inode numbers?

  - by higginbotham

  If I use smbfs to mount a filesystem, will the inodes always be the same for each file? Or am I in danger of the inodes changing when I mount the fs again or if the remote system reboots?

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• Find out which task is generating a lot of context switches on linux

  - by Gaks

  According to vmstat, my Linux server (2xCore2 Duo 2.5 GHz) is constantly doing around 20k context switches per second. # vmstat 3 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 2 0 7292 249472 82340 2291972 0 0 0 0 0 0 7 13 79 0 0 0 7292 251808 82344 2291968 0 0 0 184 24 20090 1 1 99 0 0 0 7292 251876 82344 2291968 0 0 0 83 17 20157 1 0 99 0 0 0 7292 251876 82344 2291968 0 0 0 73 12 20116 1 0 99 0 ... but uptime shows small load: load average: 0.01, 0.02, 0.01 and top doesn't show any process with high %CPU usage. How do I find out what exactly is generating those context switches? Which process/thread? I tried to analyze pidstat output: # pidstat -w 10 1 12:39:13 PID cswch/s nvcswch/s Command 12:39:23 1 0.20 0.00 init 12:39:23 4 0.20 0.00 ksoftirqd/0 12:39:23 7 1.60 0.00 events/0 12:39:23 8 1.50 0.00 events/1 12:39:23 89 0.50 0.00 kblockd/0 12:39:23 90 0.30 0.00 kblockd/1 12:39:23 995 0.40 0.00 kirqd 12:39:23 997 0.60 0.00 kjournald 12:39:23 1146 0.20 0.00 svscan 12:39:23 2162 5.00 0.00 kjournald 12:39:23 2526 0.20 2.00 postgres 12:39:23 2530 1.00 0.30 postgres 12:39:23 2534 5.00 3.20 postgres 12:39:23 2536 1.40 1.70 postgres 12:39:23 12061 10.59 0.90 postgres 12:39:23 14442 1.50 2.20 postgres 12:39:23 15416 0.20 0.00 monitor 12:39:23 17289 0.10 0.00 syslogd 12:39:23 21776 0.40 0.30 postgres 12:39:23 23638 0.10 0.00 screen 12:39:23 25153 1.00 0.00 sshd 12:39:23 25185 86.61 0.00 daemon1 12:39:23 25190 12.19 35.86 postgres 12:39:23 25295 2.00 0.00 screen 12:39:23 25743 9.99 0.00 daemon2 12:39:23 25747 1.10 3.00 postgres 12:39:23 26968 5.09 0.80 postgres 12:39:23 26969 5.00 0.00 postgres 12:39:23 26970 1.10 0.20 postgres 12:39:23 26971 17.98 1.80 postgres 12:39:23 27607 0.90 0.40 postgres 12:39:23 29338 4.30 0.00 screen 12:39:23 31247 4.10 23.58 postgres 12:39:23 31249 82.92 34.77 postgres 12:39:23 31484 0.20 0.00 pdflush 12:39:23 32097 0.10 0.00 pidstat Looks like some postgresql tasks are doing 10 context swiches per second, but it doesn't all sum up to 20k anyway. Any idea how to dig a little deeper for an answer?

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• Glusterfs : 'No route to host' for fstab mount in CentOS

  - by son_of_fire

  I am using glusterfs, and am using fstab in this way: <IPADDRESS>:/<VOLUMENAME> /some/mount/point glusterfs defaults,_netdev 0 0 but the logs for the mount continue to say the following. [<TIMESTAMP>] E [socket.c:2161:socket_connect_finish] 0-<VOLUMENAME>-client-1: connection to <IPADDRESS>:24007 failed (No route to host) I know this is not true, since when the system is up and running, I can easily issue a mount and the volume gets mounted. (I've done this by using rc.local) after reading more I have seen that using _netdev is preferred, and that if the host cannot be reached netfs will remount the volume after the network comes up, but that is not happening. (netfs is running). Is there a way to make the mount happen at a different time without using a script? (I would prefer to use fstab to manage the mounting even though I can use a script.)

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• Mounted HDD not having enough permissions from Apache/PHP

  - by Dan

  Piwigo gallery, on apache and php. The root system is a RAID 128GB. /var/www/html is on the root file system. Mounted the 320GB hdd to /var/www/html/320 using defaults, it's an ext4 fs. Put a symlink to it in /var/www/html/galleries which is read by the gallery script so I can upload images to there, then click sync. It gives me the error: [./galleries/] PWG-ERROR-NO-FS (File/directory read error) PWG-ERROR-NO-FS: The file or directory cannot be accessed (either it does not exist or the access is denied) chmod 777 set on /dev/sdb1, /var/www/html, and /var/www/html/320 as well as the symlink galleries too. All recursive. chown apache:apache to everything too. PHP just can't read/write to it. I tried with and without the symlink, I've tried everything I can think of. Nothing. Any ideas how I can give apache/php permission to read/write to this drive? With 777 permissions all around it should already be able to.

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• How to solve cryptic dpkg error?

  - by Hoang

  I get this message when my ubuntu system was crashed. dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem How to solve it?

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• See all output from commands performed inside screen

  - by user1032531

  I am using screen (http://www.gnu.org/software/screen/manual/screen.html) to access my minecraft console. I created a server in /etc/init.d, and have minecraft running in the background. Then, to access the minecraft console, I just type # screen -r in bash. I can now do commands in the screen shell. The problem is if I do some command which exports a bunch of text, it exceeds the size of the screen and pushes the begging output off the page. And I cannot seem to scroll up and see it. How can I scroll back and view all the output? How can I pause the output (maybe something like more or less)?

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• Error removing packages in Ubuntu using Synaptic

  - by ronakin

  I'm using Ubuntu 10.04 and during my tries to free space I've removed several packages such as: openoffice, all editors, and some more packages such as players and printers drivers that I don't need and seem o.k to remove. However, after restart, the graphical interface doesn't load, I'm in the xserver, I have console but not gui. I was wondering if anyone can tell me which packages I should not remove or let me know of dependencies I need to consider when messing with packages? Thanks!

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• samba4 not building in archlinux.

  - by kmplsv

  cp bin/tdbtool bin/tdbdump bin/tdbbackup /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/bin cp ./include/tdb.h /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/include cp tdb.pc /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/pkgconfig cp libtdb.a libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 mkdir -p /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` cp tdb.so /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` /bin/install -c -d /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8 for I in manpages/*.8; do \ /bin/install -c -m 644 $I /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8; \ done /bin/install: cannot stat `manpages/*.8': No such file or directory make: *** [installdocs] Error 1 Aborting... ==> ERROR: Makepkg was unable to build samba4. ==> Restart building samba4 ? [y/N] ==> ------------------------------- ==>c any ideas as what is causing my build to fail? i'm assuming it's an issue with manpages but i can't figure out exactly what package it is looking for that i don't have.

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