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Have Red Hat Enterprise Linux 6.x server. How do I find out and groups network bandwidth usage by process under Linux operating systems? How do I find out what programs are using network bandwidth under Linux operating systems? How can I see bandwidth usage per PID, command, and user on a Linux operating systems?
You need to use nethogs command. It is a small “net top” tool.
m Cycle between display modes (kb/s, kb, b, mb) r Sort by received. s Sort by sent. q Quit and return to the shell prompt. -d delay for refresh rate. -h display available commands usage. -p sniff in promiscious mode (not recommended). -t tracemode. -V prints Version info.