Simple script to control service

service_controller.sh

#!/bin/bash
TARGET_SERVICE=server_status_web
service_start_cmd='/home/pi/run/server_statisic/FlaskApp/server_status_web.py'

usage(){
	echo -e "Usage: bash $0 [ start | stop | restart ] "
	exit 1
}

start_service(){
	`${service_start_cmd} &`
}

kill_service(){
	sudo kill -9 $(ps ax | grep ${TARGET_SERVICE} | fgrep -v grep | awk '{ print $1 }')
}

service_status(){
	ps axf | grep ${TARGET_SERVICE} | fgrep -v grep
}

if [ $# -ne 1  ]; then
	usage
fi

case $1 in
	start )
			echo "Start ${TARGET_SERVICE} ..."
			start_service
			service_status
		;;
	stop )
			echo "Stop ${TARGET_SERVICE} ..."
			kill_service
			
		;;
	restart )
			echo "Restart"
			kill_service
			start_service
			service_status
		;;
	status )
			service_status
		;;
	* ) 
		usage
		;;
esac