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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/2.5 --> 5<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
6 6
7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-config.xml,v 1.98 2008/04/17 21:11:30 nightmorph Exp $ --> 7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-config.xml,v 1.99 2008/05/02 08:04:23 nightmorph Exp $ -->
8 8
9<sections> 9<sections>
10 10
11<abstract> 11<abstract>
12You need to edit some important configuration files. In this chapter 12You need to edit some important configuration files. In this chapter
13you receive an overview of these files and an explanation on how to 13you receive an overview of these files and an explanation on how to
14proceed. 14proceed.
15</abstract> 15</abstract>
16 16
17<version>9.1</version> 17<version>9.2</version>
18<date>2008-04-17</date> 18<date>2008-05-02</date>
19 19
20<section> 20<section>
21<title>Filesystem Information</title> 21<title>Filesystem Information</title>
22<subsection> 22<subsection>
23<title>What is fstab?</title> 23<title>What is fstab?</title>
24<body> 24<body>
25 25
26<p> 26<p>
27Under Linux, all partitions used by the system must be listed in 27Under Linux, all partitions used by the system must be listed in
28<path>/etc/fstab</path>. This file contains the mount points of those partitions 28<path>/etc/fstab</path>. This file contains the mount points of those partitions
29(where they are seen in the file system structure), how they should be mounted 29(where they are seen in the file system structure), how they should be mounted
30and with what special options (automatically or not, whether users can mount 30and with what special options (automatically or not, whether users can mount
31them or not, etc.) 31them or not, etc.)
32</p> 32</p>
33 33
79</impo> 79</impo>
80 80
81<pre caption="Opening /etc/fstab"> 81<pre caption="Opening /etc/fstab">
82# <i>nano -w /etc/fstab</i> 82# <i>nano -w /etc/fstab</i>
83</pre> 83</pre>
84 84
85</body> 85</body>
86<body test="func:keyval('/boot')"> 86<body test="func:keyval('/boot')">
87 87
88<p> 88<p>
89Let us take a look at how we write down the options for the <path>/boot</path> 89Let us take a look at how we write down the options for the <path>/boot</path>
90partition. This is just an example, if you didn't or couldn't create a 90partition. This is just an example, if you didn't or couldn't create a
91<path>/boot</path>, don't copy it. 91<path>/boot</path>, don't copy it.
92</p> 92</p>
93 93
94<p test="contains(func:keyval('/boot'), '/dev/hd')">
95In our default <keyval id="arch"/> partitioning example, <path>/boot</path> is
96usually the <path><keyval id="/boot"/></path> partition (or
97<path>/dev/sda*</path> if you use SCSI or SATA drives), with <c>ext2</c> as
98filesystem. It needs to be checked during boot, so we would write down:
99</p> 94<p>
100
101<p test="contains(func:keyval('/boot'), '/dev/sd')">
102In our default <keyval id="arch"/> partitioning example, <path>/boot</path> is 95In our default <keyval id="arch"/> partitioning example, <path>/boot</path> is
103usually the <path><keyval id="/boot"/></path> partition, with <c>ext2</c> as 96usually the <path><keyval id="/boot"/></path> partition, with <c>ext2</c> as
104filesystem. It needs to be checked during boot, so we would write down: 97filesystem. It needs to be checked during boot, so we would write down:
105</p> 98</p>
106 99
107<pre caption="An example /boot line for /etc/fstab"> 100<pre caption="An example /boot line for /etc/fstab">
108<keyval id="/boot"/> /boot ext2 defaults 1 2 101<keyval id="/boot"/> /boot ext2 defaults 1 2
109</pre> 102</pre>
110 103
111<p> 104<p>
112Some users don't want their <path>/boot</path> partition to be mounted 105Some users don't want their <path>/boot</path> partition to be mounted
113automatically to improve their system's security. Those people should 106automatically to improve their system's security. Those people should
114substitute <c>defaults</c> with <c>noauto</c>. This does mean that you need to 107substitute <c>defaults</c> with <c>noauto</c>. This does mean that you need to
115manually mount this partition every time you want to use it. 108manually mount this partition every time you want to use it.
116</p> 109</p>
117 110
118</body> 111</body>
119<body> 112<body>
120 113
121<p test="not(func:keyval('arch')='SPARC')"> 114<p>
122Add the rules that match your partitioning scheme and append rules for 115Add the rules that match your partitioning scheme and append rules for
123your CD-ROM drive(s), and of course, if you have other partitions or drives, 116your CD-ROM drive(s), and of course, if you have other partitions or drives,
124for those too. 117for those too.
125</p> 118</p>
126 119
127<p test="func:keyval('arch')='SPARC'">
128Add the rules that match your partitioning schema and append rules for
129<path>/proc/openprom</path>, for your CD-ROM drive(s), and of course, if
130you have other partitions or drives, for those too.
131</p>
132
133<p> 120<p>
134Now use the <e>example</e> below to create your <path>/etc/fstab</path>: 121Now use the <e>example</e> below to create your <path>/etc/fstab</path>:
135</p> 122</p>
136
137<pre caption="A full /etc/fstab example" test="func:keyval('arch')='AMD64' or func:keyval('arch')='x86'">
138<keyval id="/boot"/> /boot ext2 defaults,noatime 1 2
139/dev/hda2 none swap sw 0 0
140/dev/hda3 / ext3 noatime 0 1
141
142/dev/cdrom /mnt/cdrom auto noauto,user 0 0
143</pre>
144 123
145<pre caption="A full /etc/fstab example" test="func:keyval('arch')='HPPA'"> 124<pre caption="A full /etc/fstab example" test="func:keyval('arch')='HPPA'">
146<keyval id="/boot"/> /boot ext2 defaults,noatime 1 2 125<keyval id="/boot"/> /boot ext2 defaults,noatime 1 2
147/dev/sda3 none swap sw 0 0 126/dev/sda3 none swap sw 0 0
148/dev/sda4 / ext3 noatime 0 1 127/dev/sda4 / ext3 noatime 0 1
149 128
150/dev/cdrom /mnt/cdrom auto noauto,user 0 0 129/dev/cdrom /mnt/cdrom auto noauto,user 0 0
151</pre> 130</pre>
152 131
153<pre caption="A full /etc/fstab example" test="func:keyval('arch')='Alpha' or func:keyval('arch')='MIPS'"> 132<pre caption="A full /etc/fstab example" test="func:keyval('arch')='Alpha' or func:keyval('arch')='MIPS' or func:keyval('arch')='x86' or func:keyval('arch')='AMD64'">
154<keyval id="/boot"/> /boot ext2 defaults,noatime 1 2 133<keyval id="/boot"/> /boot ext2 defaults,noatime 1 2
155/dev/sda2 none swap sw 0 0 134/dev/sda2 none swap sw 0 0
156/dev/sda3 / ext3 noatime 0 1 135/dev/sda3 / ext3 noatime 0 1
157 136
158/dev/cdrom /mnt/cdrom auto noauto,user 0 0 137/dev/cdrom /mnt/cdrom auto noauto,user 0 0
159</pre> 138</pre>
160 139
161<pre caption="A full /etc/fstab example" test="func:keyval('arch')='SPARC'"> 140<pre caption="A full /etc/fstab example" test="func:keyval('arch')='SPARC'">
162/dev/sda1 / ext3 noatime 0 1 141/dev/sda1 / ext3 noatime 0 1
163/dev/sda2 none swap sw 0 0 142/dev/sda2 none swap sw 0 0
164/dev/sda4 /usr ext3 noatime 0 2 143/dev/sda4 /usr ext3 noatime 0 2
165/dev/sda5 /var ext3 noatime 0 2 144/dev/sda5 /var ext3 noatime 0 2
166/dev/sda6 /home ext3 noatime 0 2 145/dev/sda6 /home ext3 noatime 0 2
167 146
147<comment># You must add the rules for openprom</comment>
168openprom /proc/openprom openpromfs defaults 0 0 148openprom /proc/openprom openpromfs defaults 0 0
169 149
170/dev/cdrom /mnt/cdrom auto noauto,user 0 0 150/dev/cdrom /mnt/cdrom auto noauto,user 0 0
171</pre> 151</pre>
172 152
173<note test="func:keyval('arch')='PPC'">
174There are important variations between PPC machine types. Please make sure you
175adapt the following example to your system.
176</note>
177
178<pre caption="A full /etc/fstab example" test="func:keyval('arch')='PPC'"> 153<pre caption="A full /etc/fstab example" test="func:keyval('arch')='PPC' or
179/dev/hda4 / ext3 noatime 0 1 154func:keyval('arch')='PPC64'">
180/dev/hda3 none swap sw 0 0
181
182/dev/cdrom /mnt/cdrom auto noauto,user 0 0
183</pre>
184
185<pre caption="A full /etc/fstab example" test="func:keyval('arch')='PPC64'">
186/dev/sda4 / ext3 noatime 0 1 155/dev/sda4 / ext3 noatime 0 1
187/dev/sda3 none swap sw 0 0 156/dev/sda3 none swap sw 0 0
188 157
189/dev/cdrom /mnt/cdrom auto noauto,user 0 0 158/dev/cdrom /mnt/cdrom auto noauto,user 0 0
190</pre> 159</pre>
191 160
192<p> 161<p>
193<c>auto</c> makes <c>mount</c> guess for the filesystem (recommended for 162<c>auto</c> makes <c>mount</c> guess for the filesystem (recommended for
194removable media as they can be created with one of many filesystems) and 163removable media as they can be created with one of many filesystems) and
195<c>user</c> makes it possible for non-root users to mount the CD. 164<c>user</c> makes it possible for non-root users to mount the CD.
196</p> 165</p>
197 166
198<p> 167<p>
199To improve performance, most users would want to add the <c>noatime</c> 168To improve performance, most users would want to add the <c>noatime</c>
200mount option, which results in a faster system since access times 169mount option, which results in a faster system since access times

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