https://github.com/mariocorado/nagios-installation-script
Nagios is a system of monitoring of networks widely used, of code open, that monitors the equipment (hardware) and services (software) that is specified, alerting when the behavior of them same not is the desired.
Between their features main include the monitoring of services of network (SMTP, POP3, HTTP, SNMP...), the monitoring of them resources of systems hardware (load of the processor, use of them discs, memory, State of them ports...), independence of systems operating, possibility of monitoring remote through tunnels SSL encrypted or SSH, and the possibility of program plugins specific for new systems.
Resources:
http://nagios-plugins.org/download/
https://sourceforge.net/projects/nagios/files/nagios-4.x/
http://www.ubuntu.com/download/desktop