Delete all SYSTEM V shared memory and semaphores on UNIX-like systems

Question

How can I delete all not used semaphores and shared memory with a single command on a UNIX-like system, e.g., Ubuntu?

Answer 1

Here, save and try this script (kill_ipcs.sh) on your shell:

#!/bin/bash  ME=`whoami`  IPCS_S=`ipcs -s | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "` IPCS_M=`ipcs -m | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "` IPCS_Q=`ipcs -q | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "`   for id in $IPCS_M; do   ipcrm -m $id; done  for id in $IPCS_S; do   ipcrm -s $id; done  for id in $IPCS_Q; do   ipcrm -q $id; done 

We use it whenever we run IPCS programs in the university student server. Some people don't always cleanup so...it's needed :P

Answer 2

This works on my Mac OS:

for n in `ipcs -b -m | egrep ^m | awk '{ print $2; }'`; do ipcrm -m $n; done