This tutorial will show how to configure the network manager to use Cacti and how to set up snmp on the managed host. In this how-to, we are going to run the SNMP server and cacti on the same host and bind the service to localhost. This way, SNMP service won't be accessible from the outside. This is a good configuration when all you want to do is monitoring your home network router for instance.

In the first part of this article, we are going to install and configure the SNMP server.

A second part will present how to install and configure Cacti on the manager.
Finally, we are going to configure Cacti to collect and display CPU, Load, Memory and Network statistic of the SNMP server.

Read more at  Debuntu.org