Linux Administration Cookbook

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iftop offers a lot of options, and a peruse of the manual page is worth considering. Simple things like using -n to disable hostname lookups can be handy, or changing how the bandwidth rates are displayed.

You can even print a text-only version to stdout using the -t flag:

$ sudo iftop -i eth1 -tinterface: eth1IP address is: 192.168.33.11MAC address is: 08:00:27:f1:e9:56Listening on eth1   # Host name (port/service if enabled)            last 2s   last 10s   last 40s cumulative--------------------------------------------------------------------------------------------   1 centos2                                  =>     35.7Kb     35.7Kb     35.7Kb     8.91KB     192.168.33.10                            <=       416b       416b       416b       104B--------------------------------------------------------------------------------------------Total ...