Monitorix

Installation
sudo aptitude install -y rrdtool perl libwww-perl libmailtools-perl libmime-lite-perl librrds-perl cd /tmp/ wget http://www.monitorix.org/monitorix_3.3.0-izzy1_all.deb sudo dpkg -i monitorix*.deb sudo apt-get -f install

http://www.monitorix.org/doc-debian.html