Linux Practical Articles - Timed Task Scheduling

Task scheduling: Refers to specific commands and programs executed by the system at a certain time.

crontab timed task

Basic syntax:

crontab [选项]

Common options	Function
-e	Edit crontab timing tasks
-l	Query crontab tasks
-r	Delete all crontab tasks for the current user

service crond restart 

at timed task

at 定时任务
at **** 
Ctrl + D  两次  结束at命令的输入
at q 查看有没有at定时任务
at rm 删除某个at定时任务队列