eLuna Graph System
eLuna Graph System is an application written in Perl based on RRDTool and distributed under GNU General Public License. Its aim is collection, and then presentation in graphic form, of data, to aid in monitoring of a Linux machine.
By default, the application allows monitoring of the load, the CPU usage as a percent, memory use as a percent, number of processes, quantity of data transmitted via eth0 (In/Out) and percentage of disc space in use on /. It is nevertheless possible to add personalized elements to this.