check-prereq
checking required PERL modules
  Carp...1.29
  CGI...3.64
  Data::Dumper...2.145
  Digest::MD5...2.52
  File::Basename...2.84
  File::Find...1.23
  MIME::Base64...3.13
  POSIX...1.32
  RRDs...1.4007
  Time::HiRes...1.9725
checking optional PERL modules
  GD...2.46
  Nagios::Config... ***FAIL***
checking nagios installation
  found nagios exectuable at /usr/sbin/nagios3
  found nagios init script at /etc/init.d/nagios3
checking web server installation
  found apache executable at /usr/sbin/apache2
  found apache init script at /etc/init.d/apache2