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       ipcrm [ -M key | -m id | -Q key | -q id | -S key | -s id ]

       deprecated usage

       ipcrm [ shm | msg | sem ] id ...


       ipcrm  removes  System  V interprocess communication (IPC)
       objects and associated data structures  from  the  system.
       In order to delete such objects, you must be superuser, or
       the creator or owner of the object.

       System V IPC objects are of three  types:  shared  memory,
       message  queues,  and  semaphores.   Deletion of a message
       queue or semaphore  object  is  immediate  (regardless  of
       whether  any process still holds an IPC identifier for the
       object).  A shared memory object is only removed after all
       currently  attached processes have detached (shmdt(2)) the
       object from their virtual address space.

       Two syntax styles are supported.  The old Linux historical
       syntax  specifies  a three letter keyword indicating which
       class of object is to be deleted, followed by one or  more
       IPC identifiers for objects of this type.

       The  SUS-compliant syntax allows the specification of zero
       or more objects of all three types  in  a  single  command
       line,  with  objects specified either by key or by identi­
       fier. (See below.)  Both keys and identifiers may be spec­
       ified  in  decimal, hexadecimal (specified with an initial
       '0x' or '0X'), or octal (specified with an initial '0').


       -M shmkey
              removes the  shared  memory  segment  created  with
              shmkey after the last detach is performed.

       -m shmid
              removes  the  shared  memory  segment identified by
              shmid after the last detach is performed.

       -Q msgkey
              removes the message queue created with msgkey.

       -q msgid
              removes the message queue identified by msgid.

       -S semkey
       just identifier), and to  respect  the  same  command-line
       syntax.  For backward compatibility the previous syntax is
       still supported.


       ipcs(8),  msgctl(2),  msgget(2),   semctl(2),   semget(2),
       shmctl(2), shmdt(2), shmget(2), ftok(3)

ipcrm               last change: 19 March 2002           IPCRM(8)
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