1.新建restart_manager.sh

#!/bin/bash
source /etc/profile
pkill -f  'java -jar -jar  test-2.0.2-SNAPSHOT.jar' 

sleep 3

nohup java   -jar  test-2.0.2-SNAPSHOT.jar &

echo 'java service has started'

2.授权

chmod +x restart_manager.sh

3.执行

cron -e      
0 0 2 * *  /test/restart_manager.sh

cron -l  查看是否添加到任务