Option Group, Options and Parameters

Description

netstat [-AaLSW] [-f <family>]
[-p <protocol>] [-n]

This is the default invocation of netstat, with no mandatory options. It prompts the utility to display a list of active sockets on the host machine. The other options shown can be used to control what precisely is output; for example, “-a” causes server processes also to be shown.

netstat -i
[-abdt] [-f <family>] [-n]
netstat -I <interface>
[-abdt] [-f <family>] [-n]

Tells netstat to provide information about all network interfaces (“-i”) or a particular network interface (“-I <interface>”). The “-a” option causes multicast addresses to be shown as well, “-b” displays bytes of data in and out on the interface, “-d” shows the number of dropped packets, and “-t” displays the value of watchdog timers.

netstat -w <interval> -d
[-I <interface>]

Displays packet traffic information on all interfaces every “<interval>” seconds, or just on the specified interface if “-I <interface>” is included. If “-d” is included, also indicates the number of dropped packets.

netstat -s [-s] [-z] [-f <family>]
[-p <protocol>]

Shows system-wide statistics for each of the protocols on the system (which may be modified to show information for only a particular address family or protocol). If the “-s” option is repeated, counters that have a value of zero are suppressed; the “-z” option resets the statistics after they are displayed.

netstat -i -s
[-f <family>] [-p <protocol>]
netstat -I <interface> -s
[-f <family>] [-p <protocol>]

Displays statistics as for “netstat -s” just above, but on a per-interface basis rather than aggregated for the whole system.

netstat -m

Outputs memory management routine statistics.

netstat -r [-Aa] [-f <family>]
[-n] [-W]

Displays the contents of the host’s routing tables. The options “-A” and “-a” provide additional information about the routes.

netstat -rs [-s]

Displays routing statistics; “-s” suppresses counters with a zero value.

netstat -g [-W] [-f <family>]

Shows multicast routing information.

netstat -gs [-s] [-f <family>]

Shows multicast routing statistics; “-s” suppresses counters with a zero value.