# apt-get install nagios-nrpe-plugin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  apache2 apache2-bin apache2-data apache2-utils bsd-mailx fontconfig-config
  fonts-dejavu-core libapache2-mod-php5 libapr1 libaprutil1
  libaprutil1-dbd-sqlite3 libaprutil1-ldap libfontconfig1 libgd3 libjbig0
  libjpeg-turbo8 libjpeg8 libjs-jquery libtiff5 libvpx1 libxpm4 nagios-images
  nagios3 nagios3-cgi nagios3-common nagios3-core php5-cli php5-common
  php5-json php5-readline postfix ssl-cert

# apt-get purge nagios-nrpe-plugin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'nagios-nrpe-plugin' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

# dpkg --get-selections | grep apache
apache2						install
apache2-bin					install
apache2-data					install
apache2-utils					install
libapache2-mod-php5				install