It looks like you have a misconfigured nagios:
Error: Could not find any host matching 'mysql01' (config file
'/etc/nagios3/conf.d/hostgroups_nagios2.cfg', starting on line 31)
Error: Could not expand members specified in hostgroup (config file
'/etc/nagios3/conf.d/hostgroups_nagios2.cfg',
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You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to nagios3 in Ubuntu.
https://bugs.launchpad.net/bugs/798788
Title:
package nagios3-common 3.2.3-1ubuntu1.2 failed to install/upgrade:
subprocess installed post-installation script
