Shell script, exit by process number to shut down

#!/bin/bash Fun  () {  Ps-ef | grep "$" | awk ' {print $ $8} '  >/usr/file and  read line;d o      if [[$ line = = [$]] then          # does something//  return fi done  </usr/file   echo "shutdown ... after 3s"  Sleep 3   shutdown-h now}while true; do    var= ' date +%s '    sleep 1    if [[  $ (var%5)]-eq 0]]
  then Fun $            

　　

Check every five seconds to see if the process number exists? Does not exist then shutdow;;  stored in the/sbin/directory; and change the authority to 500;; /Ln-s/sbin/shut.sh/sbin/shut

Shell script, exit by process number to shut down