At times, I come across the following message in syslog: kernel: EXT3-fs warning (device dm-3): ext3_dx_add_entry: Directory index full!

On systems in which this is being constantly logged to syslog, this can become rather annoying, but it is not a bug. It’s informing the user that somewhere within the system, a directory has more than […]

Sometimes, after performing VPS migrations, the soft links in /etc/vz/conf may not be removed. Over time, the dead links may build up and cause many ‘No such file or directory’ messages when trying to look for common settings amonst all conf files (ie cat /etc/vz/conf/*.conf | grep whatever). Quick easy way to delete these dead […]

Check if /etc/shadow exists. If it doesn’t, run the command ‘pwconv’ then try changing the user password again.

How to disable cron based mail alerts The easiest way to disable cron based email alerts is to append the following to the specified command within the users crontab:

>/dev/null 2>&1

Example:

# m h dom mon dow command 59 23 * * * /root/scripts/hotfixes/vzagentdb.sh >/dev/null 2>&1 CRONDARGS=’-m off’ in /etc/sysconfig/crond may also be specified […]

System hangs during messagebus startup This problem has been experienced after rebooting a system in which ldap has been configured. Note that LDAP functions properly immeidately after it is setup on the machine, but hangs at “staring system message bus” after a reboot. To fix, reboot in single user mode or into linux rescue and […]