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IPCS(1)				 User Commands			       IPCS(1)

NAME
       ipcs - show information on IPC facilities

SYNOPSIS
       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 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	 sema-
	      phores.

       -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 ALSO
       ipcrm(1),   ipcmk(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  <ftp://ftp.kernel.org/pub/linux/utils/util-
       linux/>.

util-linux			   July	2014			       IPCS(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | CONFORMING TO | AUTHOR | AVAILABILITY

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