99 lines
3.1 KiB
ReStructuredText
99 lines
3.1 KiB
ReStructuredText
===========================
|
|
Documentation for /proc/sys
|
|
===========================
|
|
|
|
Copyright (c) 1998, 1999, Rik van Riel <riel@nl.linux.org>
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
'Why', I hear you ask, 'would anyone even _want_ documentation
|
|
for them sysctl files? If anybody really needs it, it's all in
|
|
the source...'
|
|
|
|
Well, this documentation is written because some people either
|
|
don't know they need to tweak something, or because they don't
|
|
have the time or knowledge to read the source code.
|
|
|
|
Furthermore, the programmers who built sysctl have built it to
|
|
be actually used, not just for the fun of programming it :-)
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
Legal blurb:
|
|
|
|
As usual, there are two main things to consider:
|
|
|
|
1. you get what you pay for
|
|
2. it's free
|
|
|
|
The consequences are that I won't guarantee the correctness of
|
|
this document, and if you come to me complaining about how you
|
|
screwed up your system because of wrong documentation, I won't
|
|
feel sorry for you. I might even laugh at you...
|
|
|
|
But of course, if you _do_ manage to screw up your system using
|
|
only the sysctl options used in this file, I'd like to hear of
|
|
it. Not only to have a great laugh, but also to make sure that
|
|
you're the last RTFMing person to screw up.
|
|
|
|
In short, e-mail your suggestions, corrections and / or horror
|
|
stories to: <riel@nl.linux.org>
|
|
|
|
Rik van Riel.
|
|
|
|
--------------------------------------------------------------
|
|
|
|
Introduction
|
|
============
|
|
|
|
Sysctl is a means of configuring certain aspects of the kernel
|
|
at run-time, and the /proc/sys/ directory is there so that you
|
|
don't even need special tools to do it!
|
|
In fact, there are only four things needed to use these config
|
|
facilities:
|
|
|
|
- a running Linux system
|
|
- root access
|
|
- common sense (this is especially hard to come by these days)
|
|
- knowledge of what all those values mean
|
|
|
|
As a quick 'ls /proc/sys' will show, the directory consists of
|
|
several (arch-dependent?) subdirs. Each subdir is mainly about
|
|
one part of the kernel, so you can do configuration on a piece
|
|
by piece basis, or just some 'thematic frobbing'.
|
|
|
|
This documentation is about:
|
|
|
|
=============== ===============================================================
|
|
abi/ execution domains & personalities
|
|
debug/ <empty>
|
|
dev/ device specific information (eg dev/cdrom/info)
|
|
fs/ specific filesystems
|
|
filehandle, inode, dentry and quota tuning
|
|
binfmt_misc <Documentation/admin-guide/binfmt-misc.rst>
|
|
kernel/ global kernel info / tuning
|
|
miscellaneous stuff
|
|
net/ networking stuff, for documentation look in:
|
|
<Documentation/networking/>
|
|
proc/ <empty>
|
|
sunrpc/ SUN Remote Procedure Call (NFS)
|
|
vm/ memory management tuning
|
|
buffer and cache management
|
|
user/ Per user per user namespace limits
|
|
=============== ===============================================================
|
|
|
|
These are the subdirs I have on my system. There might be more
|
|
or other subdirs in another setup. If you see another dir, I'd
|
|
really like to hear about it :-)
|
|
|
|
.. toctree::
|
|
:maxdepth: 1
|
|
|
|
abi
|
|
fs
|
|
kernel
|
|
net
|
|
sunrpc
|
|
user
|
|
vm
|