Bmon

bmon is a free and open-source monitoring and debugging tool to monitor bandwidth and capture and display networking-related statistics. It features various output methods including an interactive curses user interface and programmable text output for scripting. bmon allows the user to see:


 * 1) Network bandwidth real-time visualization
 * 2) Total amount of transmitted data
 * 3) CRC errors
 * 4) Collisions
 * 5) ICMPv6 traffic packets