dover@nagios:~$ dpkg -l |grep nagios
ii  nagios-common                          1.3-cvs.20050402-4ubuntu3.2        A host/service/network monitoring and manage
ii  nagios-plugins                         1.4-6ubuntu1                       Pl ugins for the nagios network monitoring an
ii  nagios-text                            1.3-cvs.20050402-4ubuntu3.2        A host/service/network monitoring and manage
dover@nagios:~$