1，查看有哪些任务 

[root@daping-6 ~]# crontab -l
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

# 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
05 3 * * * /bin/sh   /opt/datax/bin/tongbu.sh
05 5 * * *  sh /opt/datax/bin/tongbu.sh

* * * * * /win/sh/node.sh

#刷新access_token
0 1 * * * php /root/DataPackage/task/refresh_token.php
#更新账户所托管的设备
0 3 * * * php /root/DataPackage/task/moniter_list.php

2，查看执行结果

[root@daping-6 ~]# grep "refresh_token.php" /var/log/cron
May 11 01:00:01 daping-6 CROND[64924]: (root) CMD (php /root/DataPackage/task/refresh_token.php)
您在 /var/spool/mail/root 中有新邮件
[root@daping-6 ~]# grep "moniter_list.php" /var/log/cron
May 11 03:00:01 daping-6 CROND[9450]: (root) CMD (php /root/DataPackage/task/moniter_list.php)