1 =========================== 2 Documentation for /proc/sys 3 =========================== 4 5 Copyright (c) 1998, 1999, Rik van Riel <riel@nl.linux.org> 6 7 ------------------------------------------------------------------------------ 8 9 'Why', I hear you ask, 'would anyone even _want_ documentation 10 for them sysctl files? If anybody really needs it, it's all in 11 the source...' 12 13 Well, this documentation is written because some people either 14 don't know they need to tweak something, or because they don't 15 have the time or knowledge to read the source code. 16 17 Furthermore, the programmers who built sysctl have built it to 18 be actually used, not just for the fun of programming it :-) 19 20 ------------------------------------------------------------------------------ 21 22 Legal blurb: 23 24 As usual, there are two main things to consider: 25 26 1. you get what you pay for 27 2. it's free 28 29 The consequences are that I won't guarantee the correctness of 30 this document, and if you come to me complaining about how you 31 screwed up your system because of wrong documentation, I won't 32 feel sorry for you. I might even laugh at you... 33 34 But of course, if you _do_ manage to screw up your system using 35 only the sysctl options used in this file, I'd like to hear of 36 it. Not only to have a great laugh, but also to make sure that 37 you're the last RTFMing person to screw up. 38 39 In short, e-mail your suggestions, corrections and / or horror 40 stories to: <riel@nl.linux.org> 41 42 Rik van Riel. 43 44 -------------------------------------------------------------- 45 46 Introduction 47 ============ 48 49 Sysctl is a means of configuring certain aspects of the kernel 50 at run-time, and the /proc/sys/ directory is there so that you 51 don't even need special tools to do it! 52 In fact, there are only four things needed to use these config 53 facilities: 54 55 - a running Linux system 56 - root access 57 - common sense (this is especially hard to come by these days) 58 - knowledge of what all those values mean 59 60 As a quick 'ls /proc/sys' will show, the directory consists of 61 several (arch-dependent?) subdirs. Each subdir is mainly about 62 one part of the kernel, so you can do configuration on a piece 63 by piece basis, or just some 'thematic frobbing'. 64 65 This documentation is about: 66 67 =============== =============================================================== 68 abi/ execution domains & personalities 69 debug/ <empty> 70 dev/ device specific information (eg dev/cdrom/info) 71 fs/ specific filesystems 72 filehandle, inode, dentry and quota tuning 73 binfmt_misc <Documentation/admin-guide/binfmt-misc.rst> 74 kernel/ global kernel info / tuning 75 miscellaneous stuff 76 net/ networking stuff, for documentation look in: 77 <Documentation/networking/> 78 proc/ <empty> 79 sunrpc/ SUN Remote Procedure Call (NFS) 80 vm/ memory management tuning 81 buffer and cache management 82 user/ Per user per user namespace limits 83 =============== =============================================================== 84 85 These are the subdirs I have on my system. There might be more 86 or other subdirs in another setup. If you see another dir, I'd 87 really like to hear about it :-) 88 89 .. toctree:: 90 :maxdepth: 1 91 92 abi 93 fs 94 kernel 95 net 96 sunrpc 97 user 98 vm
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