Is there a linux terminal command that lets you see the amount of data coming in to your tcp connections in real time?

Question

It would be something similar to top, where you see your cpu processes in real time. I'm not looking for a GUI like Wireshark to do it.

Answer 1

iftop is cool and lightweight.

ntop is even cooler but web-based and uses a daemon.

Answer 2

IPTraf is another common real-time bandwidth monitor on Linux IPTraf-ng is a updated fork of IPTraf with ipv6 support

Answer 3

nethogs, in case you need traffic analys per application - darkstat also works (web frontend)

Answer 4

Those give all detailed info in a ui-style. If you are looking for a much simplier one use:

vnstat -l

You'll get something like (realtime updates):

[user@host ~]$ vnstat -l

Monitoring em1...    (press CTRL-C to stop)

   rx:        4 kbit/s     5 p/s          tx:        4 kbit/s     3 p/s

The same command can be used to get daily/monthly/etc traffic reports.

Answer 5

Two small utilities that do this are tcptrack and jnettop