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DESCRIPTION

The following options are available:

-4

Show AF_INET (IPv4) sockets.

-6

Show AF_INET6 (IPv6) sockets.

-c

Show connected sockets.

-f address_family

Limit listed sockets to those of the specified address_family. The following address families are recognized: inet, for AF_INET; inet6, for AF_INET6; and local or unix, for AF_LOCAL.

-l

Show listening sockets.

-n

Numeric output only. No attempt will be made to look up symbolic names for addresses and ports.

-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.

-u

Show AF_LOCAL (UNIX) sockets.

If neither -4, -6, nor -u are specified, sockstat will list sockets in all three domains.

If neither -c nor -l are specified, sockstat will list both listening and connected sockets, as well as those sockets that are in neither state.

The information listed for each socket is:

USER

The user who owns the socket.

COMMAND

The command which holds the socket.

PID

The process ID of the command which holds the socket.

FD

The file descriptor number of the socket.

PROTO

The transport protocol associated with the socket for Internet sockets, or the type of socket (stream, seqpacket or datagram) for UNIX sockets.

LOCAL ADDRESS

For Internet sockets, this is the address to which the local end of the socket is bound (see getsockname(2)). For bound UNIX sockets, it is the socket's filename or “-”.

FOREIGN ADDRESS

The address to which the foreign end of the socket is bound (see getpeername(2)) or “-” for unconnected UNIX sockets.