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ipcs — Show information about the usage of XSI IPC facilities: shared memory segments, message queues, and

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

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Problem

How to use the ipcs command: Show information about the usage of XSI IPC facilities: shared memory segments, message queues, and semaphore arrays. More information: <https://manned.org/ipcs.1p>.

Solution

ipcs — Show information about the usage of XSI IPC facilities: shared memory segments, message queues, and semaphore arrays. More information: <https://manned.org/ipcs.1p>.

Show information about [a]ll the IPC:

ipcs -a

Show information about active shared [m]emory segments, message [q]ueues or [s]empahore sets:

ipcs {{-m|-q|-s}}

Show information on maximum allowable size in [b]ytes:

ipcs -b

Show [c]reator's user name and group name for all IPC facilities:

ipcs -c

Show the [p]ID of the last operators for all IPC facilities:

ipcs -p

Show access [t]imes for all IPC facilities:

ipcs -t

Show [o]utstanding usage for active message queues, and shared memory segments:

ipcs -o

Code Snippets

Show information about [a]ll the IPC

ipcs -a

Show information about active shared [m]emory segments, message [q]ueues or [s]empahore sets

ipcs {{-m|-q|-s}}

Show information on maximum allowable size in [b]ytes

ipcs -b

Show [c]reator's user name and group name for all IPC facilities

ipcs -c

Show the [p]ID of the last operators for all IPC facilities

ipcs -p

Context

tldr-pages: common/ipcs

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