NETHOGS(8)

NAME

nethogs - Net top tool grouping bandwidth per process

nethogs [-d] [-h] [-p] [-t] [-V] [device(s)]

NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most such tools do, it groups bandwidth by process - and does not rely on a special kernel module to be loaded. So if there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this, and if it's some kind of spinning process, kill it.
Options: The -d switch delay for refresh rate.; The -h switch display available commands usage.; The -p switch sniff in promiscious mode (not recommended).; The -t switch tracemode.; The -V switch prints Version info.; device(s) to monitor. By default eth0 is being used.