#!/bin/sh python3 ./lock_test_help.py long name & sleep .2 echo "launched first, locked by: $(cat /tmp/lock_test)" python3 ./lock_test_help.py shorter & echo "launched second, locked by: $(cat /tmp/lock_test)" sleep .4 echo "waited, locked by: $(cat /tmp/lock_test)" sleep .5 echo "waited more, locked by: $(cat /tmp/lock_test)"