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Linux/Documentation/sysctl/

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File README 2717 bytes
File abi.txt 1413 bytes
File fs.txt 12684 bytes
File kernel.txt 37954 bytes
File net.txt 11702 bytes
File sunrpc.txt 784 bytes
File user.txt 2206 bytes
File vm.txt 32857 bytes

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

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