centos

Reconfigure Docker instance running out of the space. Recreate data file up to 20GB.

service docker stop
rm -rf /var/lib/docker
/etc/init.d/docker restart
dd if=/dev/zero of=/var/lib/docker/devicemapper/devicemapper/data bs=1G count=0 seek=20

In case you see “Starting tomcat6: Error code 4”, make sure you have some free space on the file system…

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Comments:

Tomáš Kašpárek - Mar 2, 2014

You can actually get this error any time even you have plenty of free space, following helps all the time rm /var/lock/subsys/tomcat6 rm /var/run/tomcat6.pid service tomcat6 start

Due to SELinux enabled we are not able to use public key authentication on Centos 6. Here is the quick fix:

test -x /sbin/restorecon && /sbin/restorecon .ssh .ssh/authorized\_keys

Centos 4 is now EOLed. You should upgrade or remove your 4.x server from production. Since EOL all repositories have been moved to vault.centos.org. Yum is not working any more because of that. Here is my quick and dirty solution.

sed "s/\/mirror\.centos\.org\/centos/\/vault\.centos\.org/g;\
s/^#baseurl/baseurl/g;\
s/^mirrorlist/#mirrorlist/g;\
s/\$releasever/4\.9/g" /etc/yum.repos.d/CentOS-Base.repo -i.bak

sed "s/\/mirror\.centos\.org\/centos/\/vault\.centos\.org/g;\
s/^#baseurl/baseurl/g;\
s/^mirrorlist/#mirrorlist/g;\
s/\$releasever/4\.9/g" /etc/yum.repos.d/CentOS-fasttrack.repo -i.bak

A few days back I’m getting this error within /var/log/maillog: file lib.c: line 37 (nearest_power): assertion failed: (num <= ((size_t)1 << (BITS_IN_SIZE_T-1))) We are using the latest dovecot package for EL4: [root@hruska tmp]# rpm -q dovecot dovecot-0.99.11-10.EL4 Package changelog has interesting entry: [root@hruska ~]# rpm -q --changelog dovecot| head * Tue Aug 09 2011 Michal Hlavinka - 0.99.11-10 - fix potential crash when parsing header names that contain NUL characters (#728674) So, let’s go fetch the #728674 entry on https://bugzilla. [Read More]

Here we go with a small patch to implement DNSBL for Horde. I have again used PEAR package, this time it is the Net_DNSBL, and as usually CentOS package is in my repos - http://fs12.vsb.cz/hrb33/el5/hrb/stable/i386/repoview/php-pear-Net-DNSBL.html. The first patch is the important one. We let the attacker to log in, just to make sure he/she owns valid stolen credentials. \--- imp/lib/Auth/imp.php.orig 2011-01-05 10:21:05.224155622 +0100 +++ imp/lib/Auth/imp.php 2011-01-05 10:39:24.699438519 +0100 @@ -146,6 +146,36 @@ return false; } + # DNSBL START + ini\_set('include\_path', ini\_get('include\_path'). [Read More]

Here is small patch to implement captcha on Horde login page. We have implemeteded Text_CAPTCHA_Numeral. Package for Centos is here: http://fs12.vsb.cz/hrb33/el5/hrb/stable/i386/repoview/php-pear-Text-CAPTCHA-Numeral.html. Here is the patch. \--- horde-webmail-1.2.8.orig/imp/login.php 2010-10-25 17:10:05.000000000 +0200 +++ horde-webmail-1.2.8/imp/login.php 2010-11-30 17:36:27.571023703 +0100 @@ -398,6 +398,7 @@ $t->set('user\_vinfo', Horde::callHook('\_imp\_hook\_vinfo', array('vdomain'), 'imp')); } $t->set('password\_tabindex', ++$tabindex); +$t->set('captch\_tabindex', ++$tabindex); $t->set('change\_smtphost', (!empty($conf\['server'\]\['change\_smtphost'\]))); if ($t->get('change\_smtphost')) { @@ -446,7 +447,16 @@ 'var imp\_auth = ' . intval($imp\_auth), 'var nomenu = ' . intval(empty($conf\['menu'\]\['always'\])), )); -echo $t->fetch(IMP\_TEMPLATES . [Read More]

Within Linux mailing list there has been post on hacked Linux box. We have recommended root kit scan. There are two important tools on Linux now, rkhunter and chkrootkit. [root@box ~]# chkrootkit ROOTDIR is '/' Checking 'amd'... not found Checking 'basename'... not infected Checking 'biff'... not found Checking 'chfn'... not infected Checking 'chsh'... not infected Checking 'cron'... not infected Checking 'crontab'... not infected Checking 'date'... not infected Checking 'du'... not infected Checking 'dirname'. [Read More]

It’s a quite long time I have announced Firefox 3.6 and Thunderbird 3.0 packages for CentOS 5.

Announcement has been submitted via CentOS mail-list. See http://lists.centos.org/pipermail/centos-devel/2010-February/005416.html and http://lists.centos.org/pipermail/centos/2010-February/090418.html. Packages have been tested by users and have been always within the testing repository only.

Today I’m pushing new firefox 3.6.2 into the stable repository together with xulrunner, mozilla-filesystem, and thunderbird. Packages are to be found here: http://fs12.vsb.cz/hrb33/el5/hrb/stable/i386/repoview/ http://fs12.vsb.cz/hrb33/el5/hrb/stable/x86_64/repoview/

DAViCal upgrade is quite easy: [root@fs12 html] wget http://debian.mcmillan.net.nz/packages/davical/davical_0.9.8.orig.tar.gz [root@fs12 html] tar xvzf davical_0.9.8.orig.tar.gz [root@fs12 html] cd davical-0.9.8.orig/dba [root@fs12 dba] su postgres bash-3.00$ ./update-davical-database The database is version 8.1 currently at revision 1.2.5. Applying patch 1.2.6.sql ... succeeded. Applying patch 1.2.7.sql ... succeeded. Successfully applied 2 patches. Supported locales updated. Updated view: dav_principal.sql applied. CalDAV functions updated. RRULE functions updated. Database permissions updated. bash-3.00$ exit [root@fs12 html] ln -s davical-0.9.8.orig davical That’s all. [Read More]