NAME

       nethogs - Net top tool grouping bandwidth per process

SYNOPSIS

       nethogs  [-V]  [-h] [-x] [-d seconds] [-v mode] [-c count] [-t] [-p] [-s] [-a] [-l] [-f filter] [-C] [-b]
       [-g period] [-P pid] [device(s)]

DESCRIPTION

       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
       -V     prints version.

       -h     prints available commands usage.

       -x     bughunt mode - implies tracemode.

       -d     delay for update refresh rate in seconds. default is 1.

       -v     view mode (0 = KB/s, 1 = total KB, 2 = total B, 3 = total MB, 4 = MB/s, 5 = GB/s). default is 0.

       -c     number of updates. default is 0 (unlimited).

       -t     tracemode.

       -p     sniff in promiscuous mode (not recommended).

       -s     sort output by sent column.

       -l     display command line.

       -a     monitor all devices, even loopback/stopped ones.

       -C     capture TCP and UDP.

       -b     Display the program basename.

       -g     garbage collection period in number of refresh. default is 50.

       -P     Show only processes with the specified pid(s).

       -f     EXPERIMENTAL:  specify  string  pcap  filter  (like  tcpdump). This may be removed or changed in a
              future version.

              device(s)
              to monitor. default is all interfaces up and running excluding loopback

INTERACTIVE CONTROL

       q      quit

       s      sort by SENT traffic

       r      sort by RECEIVED traffic

       l      display command line

       b      display the program basename

       m      switch between total (KB, B, MB) and throughput (KB/s, MB/s, GB/s) mode

RUNNING WITHOUT ROOT

       In order to be run by an unprivileged user, nethogs needs the cap_net_admin and cap_net_raw capabilities.
       These can be set on the executable by using the setcap(8) command, as follows:

           sudo setcap "cap_net_admin,cap_net_raw+pe" /usr/local/sbin/nethogs

Notes

       1. When using the -P <pid> option, in a case where a process exited (normally or abruptly), Nethogs  does
       not  track that it exited. So, the operating system might create a new process (for another program) with
       the same pid. In this case, this new process will be shown by Nethogs.

SEE ALSO

       netstat(8) tcpdump(1) pcap(3)

AUTHOR

       Written by Arnout Engelen <arnouten@bzzt.net>.

                                                14 February 2004                                      NETHOGS(8)