crontab -e 保存后会写入此位置文件中,也可以直接更改

[root@localhost ~]# ll /var/spool/cron/root 
-rw------- 1 root root 1742 Aug  8 19:11 /var/spool/cron/root

查看crontab任务

[root@blog:] ~ # crontab -l
# 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

0 1 * * * /jiaoben/rizhi.sh