Fedora user can install NetHogs using command: yum install nethogs
Ubuntu user can install NetHogs using command: sudo apt-get install nethogs
The default device to monitor is eth0. If you wish to use other device, simply type the argument after nethog, open the terminal and run the following command: nethogs eth0
When nethogs is running, press:
m: switch between total and kb/s mode
usage: nethogs [-V] [-b] [-d seconds] [-t] [-p] [device [device [device ...]]]
-V : prints version.
-d : delay for update refresh rate in seconds. default is 1.
-t : tracemode.
-b : bughunt mode - implies tracemode.
-p : sniff in promiscious mode (not recommended).