(Roughly) From: http://tracker.nagios.org/view.php?id=306
It's good that check_apt is already shipped as part of the nagios-plugins.
YUM is the current higher level package manager for all RedHat based distros, i.e. the majors RHEL (and its clones, like CentOS and Scientific Linux) and Fedora.
Therefore (because of its importance and wide spread), may I propose to include check_yum, too.
The official site for check_yum is:
The Nagios Exchange site is: