Linux Command - ifstat

The Linux ifstat command reports interface activity. It is similar to iostat or vmstat.

Might need to install it first:

sudo apt install ifstat

These are the most common, basic options you will need:

ifstat        # report every 1 second repeatedly
ifstat 3  8   # report every 3 seconds, 8 times
ifstat 0.1    # report every tenth of a second ( minimum time )

ifstat -i eno2          # monitor only this interface
ifstat -i eno2,virbr0   # monitor these interfaces