ipcs shows information on the inter-process communication facilities
for which the calling process has read access. By default it shows
information about all three resources: shared memory segments,
message queues, and semaphore arrays.
-i, --id id
Show full details on just the one resource element identified
by id. This option needs to be combined with one of the three
resource options: -m, -q or -s.
Display help text and exit.
Display version information and exit.
Resource options-m, --shmems
Write information about active shared memory segments.
Write information about active message queues.
Write information about active semaphore sets.
Write information about all three resources (default).
Of these options only one takes effect: the last one specified.
Show creator and owner.
Show resource limits.
Show PIDs of creator and last operator.
Write time information. The time of the last control
operation that changed the access permissions for all
facilities, the time of the last msgsnd() and msgrcv()
operations on message queues, the time of the last shmat() and
shmdt() operations on shared memory, and the time of the last
semop() operation on semaphores.
Show status summary.
These affect only the -l (--limits) option.
Print sizes in bytes.
Print sizes in human-readable format.
The Linux ipcs utility is not fully compatible to the POSIX ipcs
utility. The Linux version does not support the POSIX -a, -b and -o
options, but does support the -l and -u options not defined by POSIX.
A portable application shall not use the -a, -b, -o, -l, and -u
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
email@example.com. This page was obtained from the
project's upstream Git repository
2016-10-04. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to firstname.lastname@example.org
util-linux July 2014 IPCS(1)