1.创建shell脚本
vim /etc/init.d/tomcat.sh

#!/bin/bash
. /etc/profile

export JAVA_HOME=/usr/local/jdk
export JRE_HOME=$JAVA_HOME/jre

tomcatPath="/usr/local/tomcat"
binPath="$tomcatPath/bin"
echo "[info][$(date +‘%F %H:%M:%S‘)]正在监控tomcat，路径：$tomcatPath"
pid=`ps -ef|grep java | grep catalina | awk ‘{print $2}‘`
if [ -n "$pid" ]; then
echo "[info][$(date +‘%F %H:%M:%S‘)]正在运行的tomcat进程为：$pid"
echo "[info][$(date +‘%F %H:%M:%S‘)]tomcat已经启动，准备使用shutdown命令关闭..."
$binPath"/shutdown.sh"
sleep 2
pid=`ps -ef|grep java | grep catalina | awk ‘{print $2}‘`
if [ -n "$pid" ]; then
echo "[info][$(date +‘%F %H:%M:%S‘)]使用shutdown命令关闭失败，准备kill进程..."
kill -9 $pid
echo "[info][$(date +‘%F %H:%M:%S‘)]kill进程完毕！"
sleep 1
else
echo "[info][$(date +‘%F %H:%M:%S‘)]使用shutdown命令关闭成功！"
fi
else
echo "[info][$(date +‘%F %H:%M:%S‘)]tomcat未启动！"
fi
echo "[info][$(date +‘%F %H:%M:%S‘)]准备启动tomcat..."
$binPath"/startup.sh"

2.修改权限
chmod -R 777 /etc/init.d/tomcat.sh

3.创建定时任务
crontab -e 

 4.查看定时任务

 5.重启crond服务

service crond  restart

 6.查看脚本日志

tail -f /var/spool/mail/root -n 20

tomcat+crontab 定时重启