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IPCS(1)                          User CommandsIPCS(1)NAME       ipcs - show information on IPC facilitiesSYNOPSIS       ipcs [options]DESCRIPTION       ipcs  shows  information  on the inter-process communication facilities       for which the calling process has read access.  By default it shows in-       formation  about  all  three resources: shared memory segments, message       queues, and semaphore arrays.OPTIONS       -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 re-              source options: -m, -q or -s.       -h, --help              Display help text and exit.       -V, --version              Display version information and exit.   Resource options       -m, --shmems              Write information about active shared memory segments.       -q, --queues              Write information about active message queues.       -s, --semaphores              Write information about active semaphore sets.       -a, --all              Write information about all three resources (default).   Output formats       Of these options only one takes effect: the last one specified.       -c, --creator              Show creator and owner.       -l, --limits              Show resource limits.       -p, --pid              Show PIDs of creator and last operator.       -t, --time              Write time information.  The time of the last control  operation              that changed the access permissions for all facilities, the time              of the  lastmsgsnd(2)  andmsgrcv(2)  operations  on  message              queues, the time of the lastshmat(2) andshmdt(2) operations on              shared memory, and the time of the lastsemop(2)  operation  on              semaphores.       -u, --summary              Show status summary.   Representation       These affect only the -l (--limits) option.       -b, --bytes              Print sizes in bytes.       --human              Print sizes in human-readable format.SEE ALSOipcmk(1),ipcrm(1),msgrcv(2),msgsnd(2),semget(2),semop(2),shmat(2),shmdt(2),shmget(2)CONFORMING TO       The Linux ipcs utility is not fully compatible to the POSIX ipcs  util-       ity.   The  Linux  version does not support the POSIX -a, -b and -o op-       tions, 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 options.AUTHOR       Krishna Balasubramanian <balasub@cis.ohio-state.edu>AVAILABILITY       The  ipcs  command  is  part of the util-linux package and is available       from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-       linux/>.util-linux                         July 2014IPCS(1)