shell循环判断进程是否存在

shell循环判断进程是否存在

#!/bin/sh

while true
do
        process=`ps aux | grep mysqld | grep -v grep`;

        if [ "$process" == "" ]; then
                sleep 1;
                echo "process 不存在,开始执行";
                mysql;
        else
                echo "process exsits";
                break;
        fi
done