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RH/Centos sysctl parameter documentation
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:Title:        RH/Centos sysctl parameter documentation
:Author:       Douglas O'Leary <dkoleary@olearycomputers.com>
:Description:  Where to find documentation for rhel/centos kernel parms
:Date created: 04/2014
:Date updated: 04/2014
:Disclaimer:   Standard: Use the information that follows at your own risk.  If you screw up a system, don't blame it on me...

I spent what felt like a long time trying to find documentaiton on the
net.ipv4.tcp_fin_timeout parameter.  It's easy enough to change it; but, 
finding out what things it might affect - not so much.

Turns out, there are a couple of options.   First and best is to install 
*kernel-doc* rpm then examine the files under 
*/usr/share/doc/kernel-doc#/Documentation*.  To find the specific file that
had the info, I ran a simple find: ::

    # find . -name \*.txt | xargs -i grep -<li> tcp_fin_timeout {}
    ./networking/ip-sysctl.txt

If, for whatever reason, you can't install that rpm, a google search for 
your kernel rev should help.  Specific to ip-sysctl.txt, the url below
has an extensive list of kernel versions: 

http://lxr.osuosl.org/source/Documentation/networking/ip-sysctl.txt?a=ppc;v=2.6.18