Shell script 練習

if [ $# -eq 1 ]; then
        CHKPATH=/var/run/$1.pid
        if [ -e $CHKPATH ]; then
                echo "service is up"
                PID=`cat $CHKPATH`
                echo "pid = $PID"
        else
                echo "service is down"
        fi
else
        echo "arg error"
fi

PHP 寫過頭，變數名稱前面都會很順手的加上「$」，連指定的時候都不例外… Orz