Next: 6.4.2 Message Queues Up: 6.4.1 Fundamental Concepts Previous: The ipcs Command

### The `ipcrm` Command

The `ipcrm` command can be used to remove an IPC object from the kernel. While IPC objects can be removed via system calls in user code (we'll see how in a moment), the need often arises, especially under development environments, to remove IPC objects manually. Its usage is simple:

    ipcrm <msg | sem | shm>  <IPC ID>

Simply specify whether the object to be deleted is a message queue (msg), a semaphore set (sem), or a shared memory segment (shm). The IPC ID can be obtained by the `ipcs` command. You have to specify the type of object, since identifiers are unique among the same type (recall our discussion of this earlier).