sween · October 25, 2017 20:32
diff --git a/gistfile1.txt b/gistfile1.txt

 ipcs -m | cut -d' ' -f2 | grep '^[0-9]' | while read $x; do ipcrm -m $x; done

 Here's what the individual pieces do:

 ipcs -m - This command lists all current shared memory segments. (Using -s would list semaphores, etc.)
 cut -d' ' -f2 - This command cuts 2nd column from the ipcs output, using spaces as its delineating mark.
 grep '^[0-9]' - This command only allows results which begin with a number to pass through. (We don't want the header output from ipcs to mess with our process.)
 while read $x... - This command iterates over the output from the previous commands—which, by this point, will be the identifying number belonging to each shared memory segment—and runs the ipcrm IPC removal command against that output.

	ipcs -m \| cut -d' ' -f2 \| grep '^[0-9]' \| while read $x; do ipcrm -m $x; done

	Here's what the individual pieces do:

	ipcs -m - This command lists all current shared memory segments. (Using -s would list semaphores, etc.)
	cut -d' ' -f2 - This command cuts 2nd column from the ipcs output, using spaces as its delineating mark.
	grep '^[0-9]' - This command only allows results which begin with a number to pass through. (We don't want the header output from ipcs to mess with our process.)
	while read $x... - This command iterates over the output from the previous commands—which, by this point, will be the identifying number belonging to each shared memory segment—and runs the ipcrm IPC removal command against that output.