linux/Documentation/sysctl/README
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   1Documentation for /proc/sys/            kernel version 2.2.10
   2        (c) 1998, 1999,  Rik van Riel <riel@nl.linux.org>
   3
   4'Why', I hear you ask, 'would anyone even _want_ documentation
   5for them sysctl files? If anybody really needs it, it's all in
   6the source...'
   7
   8Well, this documentation is written because some people either
   9don't know they need to tweak something, or because they don't
  10have the time or knowledge to read the source code.
  11
  12Furthermore, the programmers who built sysctl have built it to
  13be actually used, not just for the fun of programming it :-)
  14
  15==============================================================
  16
  17Legal blurb:
  18
  19As usual, there are two main things to consider:
  201. you get what you pay for
  212. it's free
  22
  23The consequences are that I won't guarantee the correctness of
  24this document, and if you come to me complaining about how you
  25screwed up your system because of wrong documentation, I won't
  26feel sorry for you. I might even laugh at you...
  27
  28But of course, if you _do_ manage to screw up your system using
  29only the sysctl options used in this file, I'd like to hear of
  30it. Not only to have a great laugh, but also to make sure that
  31you're the last RTFMing person to screw up.
  32
  33In short, e-mail your suggestions, corrections and / or horror
  34stories to: <riel@nl.linux.org>
  35
  36Rik van Riel.
  37
  38==============================================================
  39
  40Introduction:
  41
  42Sysctl is a means of configuring certain aspects of the kernel
  43at run-time, and the /proc/sys/ directory is there so that you
  44don't even need special tools to do it!
  45In fact, there are only four things needed to use these config
  46facilities:
  47- a running Linux system
  48- root access
  49- common sense (this is especially hard to come by these days)
  50- knowledge of what all those values mean
  51
  52As a quick 'ls /proc/sys' will show, the directory consists of
  53several (arch-dependent?) subdirs. Each subdir is mainly about
  54one part of the kernel, so you can do configuration on a piece
  55by piece basis, or just some 'thematic frobbing'.
  56
  57The subdirs are about:
  58abi/            execution domains & personalities
  59debug/          <empty>
  60dev/            device specific information (eg dev/cdrom/info)
  61fs/             specific filesystems
  62                filehandle, inode, dentry and quota tuning
  63                binfmt_misc <Documentation/binfmt_misc.txt>
  64kernel/         global kernel info / tuning
  65                miscellaneous stuff
  66net/            networking stuff, for documentation look in:
  67                <Documentation/networking/>
  68proc/           <empty>
  69sunrpc/         SUN Remote Procedure Call (NFS)
  70vm/             memory management tuning
  71                buffer and cache management
  72
  73These are the subdirs I have on my system. There might be more
  74or other subdirs in another setup. If you see another dir, I'd
  75really like to hear about it :-)
  76
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