跑任务，很多人喜欢crond，自然是配置crontab。但是对于单个的、无须循环的job 我倒是特别倾向于

at：

[gavin@SH5 scripts]$ at -t now+3 today
at> php /home/gavin/web/front_end/scripts/geturlforgoogle.php
at> ^D
job 7 at 2006-01-11 14:18
[gavin@SH5 scripts]$ at -l
7       2006-01-11 14:18 = gavin

OK，现在可以exit。job执行完了后就会把输出以邮件的形式发给你！非常方便，无须担心忘记了crontab -r而又重新跑了这个job 

Last Modified: Thursday, January 26th, 2006 @ 03:55

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