Content-type: text/html; charset=UTF-8 Man page of IPCMK

IPCMK

Section: User Commands (1)
Updated: 2026-06-16
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NAME

ipcmk - make various IPC resources

SYNOPSIS

ipcmk [options]

DESCRIPTION

ipcmk allows you to create POSIX and System V inter-process communication (IPC) objects: shared memory segments, message queues, and semaphore (arrays for System V).

OPTIONS

Resources can be specified with these options:

-M, --shmem size

: Create a shared memory segment of size bytes. The size argument may be followed by the multiplicative suffixes KiB (=1024), MiB (=1024*1024), and so on for GiB, etc. (the "iB" is optional, e.g., "K" has the same meaning as "KiB") or the suffixes KB (=1000), MB (=1000*1000), and so on for GB, etc.

-m, --posix-shmem size

: Create a POSIX shared memory segment of size bytes. The size argument may be followed by the multiplicative suffixes KiB (=1024), MiB (=1024*1024), and so on for GiB, etc. (the "iB" is optional, e.g., "K" has the same meaning as "KiB") or the suffixes KB (=1000), MB (=1000*1000), and so on for GB, etc.

-Q, --queue

: Create a message queue.

-q, --posix-mqueue

: Create a POSIX message queue.

-S, --semaphore number

: Create a semaphore array with number of elements.

-s, --posix-semaphore

: Create a POSIX named semaphore.

-n, --name name

: Name of the POSIX IPC object. This option is mandatory for POSIX IPC objects.

Other options are:

-p, --mode mode

: Access permissions for the resource. Default is 0644.

-h, --help

: Display help text and exit.

-V, --version

: Display version and exit.

AUTHORS

REPORTING BUGS

For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.

AVAILABILITY

The ipcmk command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.

This document was created by man2html, using the manual pages.
Time: 11:48:44 GMT, September 14, 2026