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1<?xml version='1.0' encoding='UTF-8'?> 1<?xml version='1.0' encoding='UTF-8'?>
2<!DOCTYPE sections SYSTEM "/dtd/book.dtd"> 2<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3 3
4<!-- The content of this document is licensed under the CC-BY-SA license --> 4<!-- The content of this document is licensed under the CC-BY-SA license -->
5<!-- See http://creativecommons.org/licenses/by-sa/1.0 --> 5<!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
6 6
7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-config.xml,v 1.42 2004/08/06 12:16:52 neysx Exp $ --> 7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-config.xml,v 1.43 2004/08/06 13:10:11 swift Exp $ -->
8 8
9<sections> 9<sections>
10<section> 10<section>
11<title>Filesystem Information</title> 11<title>Filesystem Information</title>
12<subsection> 12<subsection>
13<title>What is fstab?</title> 13<title>What is fstab?</title>
14<body> 14<body>
15 15
16<p> 16<p>
17Under Linux, all partitions used by the system must be listed in 17Under Linux, all partitions used by the system must be listed in
18<path>/etc/fstab</path>. This file contains the mountpoints of those partitions 18<path>/etc/fstab</path>. This file contains the mountpoints of those partitions
19(where they are seen in the file system structure), how they should be mounted 19(where they are seen in the file system structure), how they should be mounted
20(special options) and when (automatically or not, can users mount those or not, 20(special options) and when (automatically or not, can users mount those or not,
21etc.). 21etc.).
22</p> 22</p>
78<path>/boot</path> partition (such as <b>PPC</b>), don't copy it verbatim. 78<path>/boot</path> partition (such as <b>PPC</b>), don't copy it verbatim.
79</p> 79</p>
80 80
81<p> 81<p>
82In our default x86 partitioning example <path>/boot</path> is the 82In our default x86 partitioning example <path>/boot</path> is the
83<path>/dev/hda1</path> partition, with <c>ext2</c> as filesystem. 83<path>/dev/hda1</path> partition, with <c>ext2</c> as filesystem.
84It needs to be checked during boot, so we would write down: 84It needs to be checked during boot, so we would write down:
85</p> 85</p>
86 86
87<pre caption="An example /boot line for /etc/fstab"> 87<pre caption="An example /boot line for /etc/fstab">
88/dev/hda1 /boot ext2 defaults 1 2 88/dev/hda1 /boot ext2 defaults 1 2
89</pre> 89</pre>
90 90
91<p> 91<p>
92Some users don't want their <path>/boot</path> partition to be mounted 92Some users don't want their <path>/boot</path> partition to be mounted
93automatically. Those people should substitute <c>defaults</c> with 93automatically to improve their system's security. Those people should
94<c>noauto</c>. This does mean that you need to manually mount this partition 94substitute <c>defaults</c> with <c>noauto</c>. This does mean that you need to
95every time you want to use it. 95manually mount this partition every time you want to use it.
96</p> 96</p>
97 97
98<p> 98<p>
99Now, to improve performance, most users would want to add the <c>noatime</c> 99Now, to improve performance, most users would want to add the <c>noatime</c>
100option as mountoption, which results in a faster system since access times 100option as mountoption, which results in a faster system since access times
101aren't registered (you don't need those generally anyway): 101aren't registered (you don't need those generally anyway):
102</p> 102</p>
103 103
104<pre caption="An improved /boot line for /etc/fstab"> 104<pre caption="An improved /boot line for /etc/fstab">
105/dev/hda1 /boot ext2 noauto,noatime 1 2 105/dev/hda1 /boot ext2 defaults,noatime 1 2
106</pre> 106</pre>
107 107
108<p> 108<p>
109If we continue with this, we would end up with the following three lines (for 109If we continue with this, we would end up with the following three lines (for
110<path>/boot</path>, <path>/</path> and the swap partition): 110<path>/boot</path>, <path>/</path> and the swap partition):
111</p> 111</p>
112 112
113<pre caption="Three /etc/fstab lines"> 113<pre caption="Three /etc/fstab lines">
114/dev/hda1 /boot ext2 noauto,noatime 1 2 114/dev/hda1 /boot ext2 defaults,noatime 1 2
115/dev/hda2 none swap sw 0 0 115/dev/hda2 none swap sw 0 0
116/dev/hda3 / ext3 noatime 0 1 116/dev/hda3 / ext3 noatime 0 1
117</pre> 117</pre>
118 118
119<p> 119<p>
120To finish up, you should add a rule for <path>/proc</path>, <c>tmpfs</c> 120To finish up, you should add a rule for <path>/proc</path>, <c>tmpfs</c>
121(required) and for your CD-ROM drive (and of course, if you have other 121(required) and for your CD-ROM drive (and of course, if you have other
122partitions or drives, for those too): 122partitions or drives, for those too):
123</p> 123</p>
124 124
125<pre caption="A full /etc/fstab example"> 125<pre caption="A full /etc/fstab example">
126/dev/hda1 /boot ext2 noauto,noatime 1 2 126/dev/hda1 /boot ext2 noauto,noatime 1 2
127/dev/hda2 none swap sw 0 0 127/dev/hda2 none swap sw 0 0
128/dev/hda3 / ext3 noatime 0 1 128/dev/hda3 / ext3 noatime 0 1
129 129

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