check_vzquota.pl

checks quota of Virtuozzo Containers.

shows warning when usage is more than 90% of softlimit, critical when usage=softlimit.
when ok, shows number of running containers.

if you want to run it via nrpe. place script to /usr/local/sbin/check_vzquota and chmod 700
add this to /etc/nagios/nrpe.cfg:
=========
command[check_vzquota]=sudo /usr/bin/perl /usr/local/sbin/check_vzquota
=========

and change /etc/sudoers (using visudo):
=========
#Defaults requiretty (comment this string)
nrpe ALL=(root) NOPASSWD: /usr/bin/perl /usr/local/sbin/check_vzquota
=========

based on:
http://exchange.nagios.org/directory/Plugins/System-Metrics/File-System/check_vzquota/details

all bash parts were removed, now it is pure perl.
functionality improved.