需求：
1、可通过 service spider start|stop|status|restart 命令对服务进行控制
2、spider服务可开机自启动

start()

{

    echo "start spider"

    /home/projects/spider/spider -d &

    exit 0;

}

stop()

{

    echo -n "stop spider"

    if pkill spider

        then

        echo  " [ok]"

    else

        echo  " [failed]"

    fi

}

case "$1" in

start)

    start

    ;;

stop)

    stop

    ;;

restart)

    stop

    start

    ;;

*)

    echo "usage: $0 start|stop|restart"

    exit 0;

esac