Glances monitoring tool

Glances is free software that monitors the performance of the Linux system. Glances is a free tool written in python language. It monitors the CPU, Load average, memory, network interface, disk I/O, processes and file system space utilization. The main feature of glances tool is the threshold information which is indicated in three colors like Green, Violet and Red (careful, warning and critical respectively). The colors show the level of bottleneck in the system.