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	Submitted by: lvo
coolcommand ipcrm - how to clear a shared memory segment which ipcrm says does not exist
Description If you run the following command to remove a shared memory segment and you get this error: # ipcrm -m 65537 ipcrm: 0515-020 shmid(65537) was not found. However, if you run the ipcs command, you still see the segment there: # ipcs \| grep 65537 m 65537 0x00000000 DCrw------- root system If you look carefully, you will notice the "D" in the forth column. The "D" means: D If the associated shared memory segment has been removed. It disappears when the last process attached to the segment detaches it. So, to clear the shared memory segment, find the process which is still associated with the segment: # ps -ef \| grep process_owner where process_owner is the name of the owner using the shared segment Now kill the process found from the ps command above # kill -9 pid Running another ipcs command will show the shared memory segment no longer exists: # ipcs \| grep 65537
Example ipcrm -m 65537

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