/usr/bin/capstats

/usr/bin/capstats: unrecognized option '--help'
capstats [Options] -i interface

  -i| --interface <interface>    Listen on interface
  -f| --filter <filter>          BPF filter
  -I| --interval <secs>          Stats logging interval
  -l| --syslog                   Use syslog rather than print to stderr
  -n| --number <count>           Stop after outputting <number> intervals
  -N| --select                   Use select() for live pcap (for testing only)
  -p| --payload <n>              Verifies that packets' payloads consist entirely of bytes of the given value.
  -q| --quiet <count>            Suppress output, exit code indicates >= count packets received.
  -S| --size <size>              Verify packets to have given <size>
  -s| --snaplen <size>           Use pcap snaplen = <size>
  -v| --version                  Print version and exit
  -w| --write <filename>         Write packets to file