lsipc(1) — Linux manual page


LSIPC(1)                      User Commands                     LSIPC(1)

NAME         top

       lsipc - show information on IPC facilities currently employed in
       the system

SYNOPSIS         top

       lsipc [options]

DESCRIPTION         top

       lsipc shows information on the System V inter-process
       communication facilities for which the calling process has read

OPTIONS         top

       -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.  It is
              possible to override the default output format for this
              option with the --list, --raw, --json or --export option.

       -g, --global
              Show system-wide usage and limits of IPC resources.  This
              option may be combined with one of the three resource
              options: -m, -q or -s.  The default is to show information
              about all resources.

       -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.

   Output formatting
       -c, --creator
              Show creator and owner.

       -e, --export
              Produce output in the form of key="value" pairs.  All
              potentially unsafe value characters are hex-escaped
              (\x<code>).  The key (variable name) will be modified to
              contain only characters allowed for a shell variable
              identifiers, for example, USE_PCT instead of USE%.

       -J, --json
              Use the JSON output format.

       -l, --list
              Use the list output format.  This is the default, except
              when --id is used.

       -n, --newline
              Display each piece of information on a separate line.

              Do not print a header line.

              Don't truncate output.

       -o, --output list
              Specify which output columns to print.  Use --help to get
              a list of all supported columns.

       -b, --bytes
              Print size in bytes rather than in human readable format.

       -r, --raw
              Raw output (no columnation).

       -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(2) and msgrcv(2)
              operations on message queues, the time of the last
              shmat(2) and shmdt(2) operations on shared memory, and the
              time of the last semop(2) operation on semaphores.

       --time-format type
              Display dates in short, full or iso format.  The default
              is short, this time format is designed to be space
              efficient and human readable.

       -P, --numeric-perms
              Print numeric permissions in PERMS column.

EXIT STATUS         top

       0      if OK,

       1      if incorrect arguments specified,

       2      if a serious error occurs.

HISTORY         top

       The lsipc utility is inspired by the ipcs utility.

AUTHORS         top

       Ondrej Oprala ⟨⟩
       Karel Zak ⟨⟩

SEE ALSO         top

       ipcmk(1), ipcrm(1), msgrcv(2), msgsnd(2), semget(2), semop(2),
       shmat(2), shmdt(2), shmget(2), sysvipc(7)

AVAILABILITY         top

       The lsipc command is part of the util-linux package and is
       available from Linux Kernel Archive 

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found
       at ⟨⟩.  If you
       have a bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2021-03-21.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-03-19.)  If you
       discover any rendering problems in this HTML version 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
       manual page), send a mail to

util-linux                    November 2015                     LSIPC(1)

Pages that refer to this page: sysvipc(7)