crontab -e
# For details see man 4 crontabs # Example of job definition:# .---------------- minute (0 - 59)# |  .------------- hour (0 - 23)# |  |  .---------- day of month (1 - 31)# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat# |  |  |  |  |# *  *  *  *  * user-name  command to be executed #每60分种执行# */60 * * * * root /root/java/test1.sh#每天1点20分 执行# 20 1 * * * root /root/java/test2.sh#文件最初肯定要留一个空行,不然命名:crontab /etc/crontab会报错

重启服务:

sudo systemctl restart crond.service 

查看工作

crontab -l

查看日志:

tailf /var/log/cron