Nagios hints for Ubuntu/Debian (updated for nagios3)
Some Nagios hints:
1. To get nagios2
 and all plugins not moved to nagios2-
* packages, do this:
sudo apt-get remove nagios nagios-common
sudo apt-get install nagios-plugins-basic nagios-plugins-standard \
 nagios2 nagios2-common nagios2-doc
2. To enable external commands, these steps are necessary:
Edit /etc/nagios2/nagios.cfg and set check_external_commands to 1, i.e.:Â check_external_commands=1
Then you have to repair some file access modes, Thanks to gmcf for these lines:
sudo /etc/init.d/nagios2 stop
sudo dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios2/rw
sudo dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios2
sudo /etc/init.d/nagios2 start
For nagios3:
/etc/init.d/nagios3 stop
dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw
dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios3
/etc/init.d/nagios3 start
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From: IBCL BLog.
Originally posted: 2008-05-02