nethogs - Net top tool grouping bandwidth per process

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

                                                14 February 2004                                      NETHOGS(8)

       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 bytes, 3 = total MB, 4 = MB/s, 5 = GB/s). default is
              0.

              kB: 2e10 bytes, MB: 2e20 bytes, GB: 2e30 bytes

       -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

       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

       nethogs - Net top tool grouping bandwidth per process

       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.

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

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

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

nethogs  [-V]  [-h] [-x] [-dseconds] [-vmode] [-ccount] [-t] [-p] [-s] [-a] [-l] [-ffilter] [-C] [-b]
       [-gperiod] [-Ppid] [device(s)]