bash switch case

case "$1" in
        start)
            start ;;
        stop)
            stop ;;
        restart)
            stop; start ;;
        *)
            echo $"Usage: $0 {start|stop|restart}"
            exit 1
esaccase expression in
    pattern1 )
        statements ;;
    pattern2 )
        statements ;;
    ...
esac
case $1 in
start)
    #Start logic
    ;;
stop)
    # Stop logic
    ;;
*)
	# Default logic
    echo $"Usage: $0 {start|stop}"
    exit 1
    ;;
esacbash case notation