1.写一个shell脚本test.sh，重新启动tomcat

#!/bin/sh . /etc/profile pid=`ps aux | grep tomcat | grep -v grep | grep -v retomcat | awk '{print $2}'` echo $pid if [ -n "$pid" ] then { echo ===========shutdown================ /opt/tomcat/bin/shutdown.sh sleep 1 pid=`ps aux | grep tomcat | grep -v grep | grep -v retomcat | awk '{print $2}'` if [ -n "$pid" ] then { sleep 1 echo ========kill tomcat============== kill -9 $pid } fi sleep 1 echo ===========startup.sh============== /opt/tomcat/bin/startup.sh } else echo ===========startup.sh============== /opt/tomcat/bin/startup.sh fi

2.把test.sh文件放到root目录下

3.提高权限

chmod a+x test.sh

4.在控制台上输入以下命令
  crontab -e
5.按i键编辑这个文本文件，输入以下内容，每天凌晨4：30重启tomcat
  30 04 * * * /root/test.sh
  

  按esc键退出编辑，输入wq回车保存

6.启动定时服务

[root@]# service crond stop

[root@]# service crond start