Need comprehensive document on server security issues

I would like to know where I can find a full comprehensive document(s) on making a linux server rock solid and intrusion proof.

Do note, I have already been through posts like

http://www.webhostingtalk.com/showth...threadid=98981 (especially the ones posted by MotleyFool)

which deal on the surface and generic level of do's and don'ts.

Those are valid points but nevertheless

I really want to know where can I find articles or even books which are written by experienced certified server admins which deal with issues about hacking and making a server bulletproof.

Any pointers will be greatly and truly appreciated.

Thanks in advance.

 

 

 

 

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