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ipcs
Show information about the usage of XSI IPC facilities: shared memory segments, message queues, and semaphore arrays.
Examples
Show information about all active IPC facilities GNU
Show information about active shared memory segments, message queues or semaphore sets GNU
Show full details on the resource with a specific ID GNU
Show limits in bytes or in a human-readable format GNU
Show summary about current usage GNU
Show creator's and owner's UIDs and PIDs for all IPC facilities GNU
Show the PID of the last operators for all IPC facilities GNU
Show last access times for all IPC facilities GNU
Show information about all the IPC
Show information about active shared memory segments, message queues or semaphore sets
Show information on maximum allowable size in bytes
Show creator's user name and group name for all IPC facilities
Show the pID of the last operators for all IPC facilities
Show access times for all IPC facilities
Show outstanding usage for active message queues, and shared memory segments