How to rebuild Linux shell?

Hii there,I'm new in this forum so I might not be posting in ri8 section. Sry for that,Btw, I just want to rebuild <or just say build> Linux shell from the scratch. I want some tuts in this regard. Plz help me out.

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Header Checks File Not Working in postfix to block spam mail

We are using Postfix as mail server. Because of heavy spam coming in we wanted to ban mails from certain domains. We put these in the "header_checks" file ( the file in use is shown below ) . Surprisingly the mails from domains entered in the file are ...

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iptable rule to share internet

hi every one.., im useing fedora 8 in my office..,i want to share internet in my office to testing department..,i dnt want to use squid for that is there is any iptable rule to share internet but main thing outlook must work in the windows client syst...

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