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 information 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 resource 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 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 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 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 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/⟩.