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Date: Thu, 1 Feb 2007 13:11:33 -0800
From: "Josh Carroll" <josh.carroll@gmail.com>
To: "astalus razvan" <oaky20@gmail.com>
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> In bash or csh I want to start nmap scanning at every 1 hour.how can I do this?
>                                     thanks

Use cron (man cron, man 5 crontab). Something like:

0 * * * * /usr/local/bin/nmap ....

Would run it on the hour, each hour. Read the man pages for more details.

Josh