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sockstat — List open Internet or UNIX domain sockets. More information: <https://man.freebsd.org/cgi/man.cgi?so

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commanddomaincliopensockstatunixlistinternet

linux

Problem

How to use the sockstat command: List open Internet or UNIX domain sockets. More information: <https://man.freebsd.org/cgi/man.cgi?sockstat>.

Solution

sockstat — List open Internet or UNIX domain sockets. More information: <https://man.freebsd.org/cgi/man.cgi?sockstat>.

View which users/processes are [l]istening on which ports:

sockstat -l

Show information for IPv[4]/IPv[6] sockets [l]istening on specific [p]orts using a specific [P]rotocol:

sockstat -{{4|6}} -l -P {{tcp|udp|sctp|divert}} -p {{port1,port2...}}

Also show [c]onnected sockets, not resolving [n]umeric UIDs to user names and using a [w]ider field size:

sockstat -cnw

Only show sockets that belong to a specific [j]ail ID or name in [v]erbose mode:

sockstat -jv

Display the protocol [s]tate and the remote [U]DP encapsulation port number, if applicable (these are currently only implemented for SCTP and TCP):

sockstat -sU

Display the [C]ongestion control module and the protocol [S]tack, if applicable (these are currently only implemented for TCP):

sockstat -CS

Only show Internet sockets if the local and foreign addresses are not in the loopback network prefix 127.0.0.0/8, or do not contain the IPv6 loopback address ::1:

sockstat -L

Do not show the header ([q]uiet mode), showing [u]nix sockets and displaying the inp_gencnt:

sockstat -qui

Code Snippets

View which users/processes are [l]istening on which ports

sockstat -l

Show information for IPv[4]/IPv[6] sockets [l]istening on specific [p]orts using a specific [P]rotocol

sockstat -{{4|6}} -l -P {{tcp|udp|sctp|divert}} -p {{port1,port2...}}

Also show [c]onnected sockets, not resolving [n]umeric UIDs to user names and using a [w]ider field size

sockstat -cnw

Only show sockets that belong to a specific [j]ail ID or name in [v]erbose mode

sockstat -jv

Display the protocol [s]tate and the remote [U]DP encapsulation port number, if applicable (these are currently only implemented for SCTP and TCP)

sockstat -sU

Context

tldr-pages: freebsd/sockstat

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