#!/bin/sh ps -fe|grep mysqld |grep -v grep if [ $? -ne 0 ] then echo "start process....." service mysql start else echo "runing....." fi   DATE=`date +%Y%m%d%H%M%S` echo $DATE >> /backup/mysql/test.txt 0表示存在的 $? -ne 0 不存在，$? -eq 0 存在 vi … 继续阅读 →