What to do when hpacucli is locked but there is no process for it # hpacucli HP Array Configuration Utility CLI Detecting Controllers… Error: Another instance of ACU is already running (possibly a service). Please terminate the ACU application before running the ACU CLI. # ps -ef | grep -i acu root     26127 11377  0 15:12 pts/3    00:00:00 grep -i acu goto /opt/compaq/cpqacuxe/bld/locks and remove all the files in that directory then run hpacucli