自动化部署 - Linux环境下定时重启jar

1、编写需要执行的shell脚本：
// 大意：先杀掉进程，再清除日志，再重启jar服务
echo "重启webSocket"
pidlist=`ps -ef |grep SystemCommunication |grep -v "grep"|awk '{print $2}'`
kill -9 $pidlist 
rm $webSocket_home/nohup.out
nohup /home/software/jdk1.8.0_221/bin/java -jar /home/SystemCommunication.jar > /home/utry/nohup.out &

2、设置定时任务：

crontab -e  // 编辑Linux定时任务配置文件

05 16 * * * /home/webSocketStart.sh

crontab -l  // 查看当前所有的定时任务

05 16 * * * /home/webSocketStart.sh

3、查看定时任务日志：

tail -f /var/log/cron

Oct 21 16:02:16 localhost crontab[12132]: (root) END EDIT (root)
Oct 21 16:02:37 localhost crontab[12166]: (root) LIST (root)
Oct 21 16:03:01 localhost crond[675]: (root) RELOAD (/var/spool/cron/root)
Oct 21 16:03:01 localhost CROND[12249]: (root) CMD (/home/utry/webSocketStart.sh)
Oct 21 16:04:01 localhost crontab[12392]: (root) BEGIN EDIT (root)
Oct 21 16:04:22 localhost crontab[12392]: (root) REPLACE (root)
Oct 21 16:04:22 localhost crontab[12392]: (root) END EDIT (root)
Oct 21 16:05:01 localhost crond[675]: (root) RELOAD (/var/spool/cron/root)
Oct 21 16:05:01 localhost CROND[12503]: (root) CMD (/home/utry/webSocketStart.sh)
Oct 21 16:09:44 localhost crontab[12982]: (root) BEGIN EDIT (root)
Oct 21 16:12:19 localhost crontab[12982]: (root) REPLACE (root)
Oct 21 16:12:19 localhost crontab[12982]: (root) END EDIT (root)
Oct 21 16:13:01 localhost crond[675]: (root) RELOAD (/var/spool/cron/root)
Oct 21 16:14:07 localhost crontab[13419]: (root) BEGIN EDIT (root)
Oct 21 16:14:38 localhost crontab[13419]: (root) REPLACE (root)
Oct 21 16:14:38 localhost crontab[13419]: (root) END EDIT (root)
Oct 21 16:14:41 localhost crontab[13456]: (root) LIST (root)
Oct 21 16:15:01 localhost crond[675]: (root) RELOAD (/var/spool/cron/root)