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ipcmk - Man Page

make various IPC resources

Examples (TL;DR)


ipcmk [options]


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


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.

-Q,  --queue

Create a message queue.

-S,  --semaphore number

Create a semaphore array with number of elements.

Other options are:
-p,  --mode mode

Access permissions for the resource. Default is 0644.

-h,  --help

Display help text and exit.

-V,  --version

Print version and exit.


Hayden A. James

See Also

ipcrm(1), ipcs(1), sysvipc(7)

Reporting Bugs

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


The ipcmk command is part of the util-linux package which can be downloaded from Linux Kernel Archive.

Referenced By

ipcrm(1), ipcs(1), lsipc(1), pcp-ipcs(1), sysvipc(7).

2024-04-24 util-linux 2.40.2