Shared memory, Semaphore, queue information management under Unix/linux

Under Unix/linux, there are often problems caused by shared memory, semaphores, queues and other shared information that are not cleanly clear.
The command to view the memory sharing information is IPCS [-m|-s|-q]. Shared memory, Semaphore, queue information are listed by default,-m lists shared memory,-s lists shared semaphores, and-Q lists shared queues
The Purge command is a IPCRM [-m|-s|-q] ID.
-m delete shared memory,-s delete shared semaphore,-Q delete Shared Queue.

Shared memory, Semaphore, queue information management under Unix/linux