Bytes / Packets sent through a network interface

I use bmon:
apt install bmon

You can also see this information by typing:
ipconfig eth0

And at the bottom of the stats displayed you should see something like:
RX bytes:115855943 (115.8 MB) TX bytes:9943991 (9.9 MB)

Get low cost holiday inspiration with my new project: GoHere.holiday :)