Java приложение в качестве демона на сервере

#!/bin/sh
#
# test-daemon          Manage test-daemon service.
#
# chkconfig: 2345 90 60
# description: 
#
APP_PATH=/<папка с jar или war файлом>
JARFile=<имя jar/war файла>
PIDFile=/var/run/test-daemon.pid
# для отладки все что после -Xmx2g
JVM_OPTS="-Xmx2g -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005" 
export LANG=en_US.UTF-8
 
function check_if_pid_file_exists {
    if [ ! -f $PIDFile ]
    then
 echo "PID file not found: $PIDFile"
        exit 1
    fi
} 
 
function check_if_process_is_running {
 if ps -p $(print_process) > /dev/null
 then
     return 0
 else
     return 1
 fi
}
 
function print_process {
    echo $(<"$PIDFile")
}
 
case "$1" in
  status)
    check_if_pid_file_exists
    if check_if_process_is_running
    then
      echo $(print_process)" is running"
    else
      echo "Process not running: $(print_process)"
    fi
    ;;
  stop)
    check_if_pid_file_exists
    if ! check_if_process_is_running
    then
      echo "Process $(print_process) already stopped"
      exit 0
    fi
    kill -TERM $(print_process)
    echo -ne "Waiting for process to stop"
    NOT_KILLED=1
    for i in {1..20}; do
      if check_if_process_is_running
      then
        echo -ne "."
        sleep 1
      else
        NOT_KILLED=0
      fi
    done
    echo
    if [ $NOT_KILLED = 1 ]
    then
      echo "Cannot kill process $(print_process)"
      exit 1
    fi
    echo "Process stopped"
    rm $PIDFile
    ;;
  start)
    if [ -f $PIDFile ] && check_if_process_is_running
    then
      echo "Process $(print_process) already running"
      exit 1
    fi
    cd $APP_PATH
    /usr/bin/java $JVM_OPTS -jar $JARFile >& $APP_PATH/critical.log & 
    echo $! > $PIDFile
    echo "Process started"
    ;;
  restart)
    $0 stop
    if [ $? = 1 ]
    then
      exit 1
    fi
    $0 start
    ;;
  *)
    echo "Usage: $0 {start|stop|restart|status}"
    exit 1
esac
 
exit 0

chmod +x test-daemon

service test-daemon start
service test-daemon stop
service test-daemon restart