sockstat(1) list open sockets


[-clh ] [-p ports ] [-P pid|process ] [-U uid|user ] [-G gid|group ]


The command lists open Internet or UNIX domain sockets.

The following options are available:

Show connected sockets.
Show listening sockets.
Show a usage summary.
-p ports
Only show Internet sockets if either the local or foreign port number is on the specified list. The ports argument is a comma-separated list of port numbers and ranges specified as first and last port separated by a dash.
-P pid|process
Only show sockets of the specified pid|process The pid|process argument is a process name or pid.
-U uid|user
Only show sockets of the specified uid|user The uid|user argument is a username or uid.
-G gid|group
Only show sockets of the specified gid|group The gid|group argument is a groupname or gid.

If neither -c or -l is specified, will list both listening and connected sockets.

The information listed for each socket is:

The user who owns the socket.
The command which holds the socket.
The process ID of the command which holds the socket.
The file descriptor number of the socket.
The transport protocol associated with the socket for Internet sockets, or the type of socket (stream or datagram) for UNIX sockets.
For Internet sockets, this is the address the local end of the socket is bound to (see getsockname(2)). For bound UNIX sockets, it is the socket's filename. For other UNIX sockets, it is a right arrow followed by the endpoint's filename, or ``?? '' if the endpoint could not be determined.
(Internet sockets only) The address the foreign end of the socket is bound to (see getpeername(2)).


The command appeared in Fx 3.1 .


The command and this manual page were written by Dag-Erling Smørgrav <[email protected]>.

The command was ported to Linux by William Pitcock <[email protected]>.