My environment is centos 7
1. Create a new .sh script file in a directory (generally cron is installed in var/spool/cron, so I created the script here)
vim /var/spool/cron/tomcatStart.sh
2. Write the code in the tomcatStart.sh file
#!/bin/bash
/etc/profile
tomcatPath="/usr/local/tomcat"
binPath="$tomcatPath/bin"
echo "[info][$(date)]正在监控tomcat，路径：$tomcatPath"
pid=`ps -ef | grep tomcat | grep -w $tomcatPath | grep -v 'grep' | awk '{print $2}'`
if [ -n "$pid" ]; then
echo "[info][$(date)]tomcat进程为：$pid"
echo "[info][$(date)]tomcat已经启动，准备使用shutdown命令关闭"
$binPath"/shutdown.sh"
sleep 2
pid=`ps -ef | grep tomcat | grep -w $tomcatPath | grep -v 'grep' | awk '{print $2}'`
if [ -n "$pid" ]; then
echo "[info][$(date)]使用shutdown关闭失败，准备kill进程"
kill -9 $pid
echo "[info][$(date)]kill进程完毕"
sleep 1
else
echo "[info][$(date)]使用shutdown关闭成功"
fi
else
echo "[info][$(date)]tomcat未启动"
fi
echo "[info][$(date)]准备启动tomcat"
$binPath"/startup.sh"
Note: if [-n "$pid" ]; then, there must be a space after the bracket "[" in this statement, and a space before "]"
3. Modify the permissions of tomcatStart.sh
chmod +x /var/spool/cron/tomcatStart.sh
4. Add script to crontab timing task
vi /etc/crontab
// The first is the path of tomcatStart.sh, the second is to output the log to a file
00 03 * * * root /var/spool/cron/tomcatStart.sh >> /usr/local/tomcat/tomcatStartLog.txt
5. Restart crontab to take effect
systemctl restart crond
or
service crond restart
Note: if [-n "$pid" ]; then, there must be a space after the bracket "[", and there must be a space before "]".
Note: The timer and other operations are not described in detail, please refer to linux timing for details Backup MySQL database
Author: 10676
Link: https: //www.jianshu.com/p/45455f36e859