CAPSTATS(8) - Linux man page online | Administration and privileged commands

Print statistics about the current load on a network interface.

January 15, 2010
CAPSTATS(8) System Manager's Manual CAPSTATS(8)


capstats - print statistics about the current load on a network interface


capstats [ options ] -i interface


This manual page documents briefly the capstats command. capstats is a program that prints statistics about the current load on a network interface using libpcap. It reports statistics per time interval and/or for the tool's total run- time. Here's an example output with output in one-second intervals until CTRL-C is hit: >capstats -i eth0 -I 1 1186620936.890567 pkts=12747 kpps=12.6 kbytes=10807 mbps=87.5 nic_pkts=12822 nic_drops=0 u=960 t=11705 i=58 o=24 nonip=0 1186620937.901490 pkts=13558 kpps=13.4 kbytes=11329 mbps=91.8 nic_pkts=13613 nic_drops=0 u=1795 t=24339 i=119 o=52 nonip=0 1186620938.912399 pkts=14771 kpps=14.6 kbytes=13659 mbps=110.7 nic_pkts=14781 nic_drops=0 u=2626 t=38154 i=185 o=111 nonip=0 1186620939.012446 pkts=1332 kpps=13.3 kbytes=1129 mbps=92.6 nic_pkts=1367 nic_drops=0 u=2715 t=39387 i=194 o=112 nonip=0 === Total 1186620939.012483 pkts=42408 kpps=13.5 kbytes=36925 mbps=96.5 nic_pkts=1 nic_drops=0 u=2715 t=39387 i=194 o=112 nonip=0


These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. -i, --interface interface Listen on interface -d, --dag Use native DAG API if capstats was built with DAG support. -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 count intervals -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 filename




capstats was written by Robin Sommer <> This manual page was written by Justin Azoff <>, for the Debian project (but may be used by others).
January 15, 2010 CAPSTATS(8)
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