A unix/linux question

I have question regarding a program in linux/unix that can start another program at specific time. I can't remember the exact name of it, which is something like "crown"..? Could anyone here tell me what it is?

Thanks a lot

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cron -cainao....- 给 cainao.... 发送悄悄话 (0 bytes) () 05/23/2005 postreply 14:52:00

at -Azz1- 给 Azz1 发送悄悄话 (0 bytes) () 05/23/2005 postreply 21:48:02

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