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    Command:

    ipcrm

    
    
    

    SYNOPSIS

           ipcrm [ -M key | -m id | -Q key | -q id | -S key | -s id ] ...
    
           deprecated usage
    
           ipcrm {shm|msg|sem} id...
    
    
    

    DESCRIPTION

           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 identi-
           fier 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 spec-
           ifies 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 spec-
           ified either by key or by identifier. (See below.)  Both keys and iden-
           tifiers  may  be  specified  in decimal, hexadecimal (specified with an
           initial '0x' or '0X'), or octal (specified with an initial '0').
    
    
    

    OPTIONS

           -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
                  removes the semaphore created with semkey.
    
           -s semid
                  removes the semaphore identified by semid.
    
    
    
    

    AVAILABILITY

           The ipcrm command is part of the util-linux-ng package and is available
           from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
    
    
    

    ipcrm last change: 19 March 2002 IPCRM(1)

    
    
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