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

1 line will do all

For message queue

ipcs -q | sed "$ d; 1,2d" |  awk '{ print "Removing " $2; system("ipcrm -q " $2) }'

ipcs -q will give the records of message queues

sed "$ d; 1,2d " will remove last blank line ("$ d") and first two header lines ("1,2d")

awk will do the rest i.e. printing and removing using command "ipcrm -q" w.r.t. the value of column 2 (coz $2)