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git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/testing/BOOK@4002 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
67 lines
2.9 KiB
XML
67 lines
2.9 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-bootable-fstab">
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<title>Creating the /etc/fstab file</title>
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<?dbhtml filename="fstab.html"?>
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<indexterm zone="ch-bootable-fstab"><primary sortas="e-/etc/fstab">/etc/fstab</primary></indexterm>
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<para>The <filename>/etc/fstab</filename> file is used by some
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programs to determine where file systems are to be mounted by default,
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which must be checked, and in which order. Create a new file systems
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table like this:</para>
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<screen><userinput>cat > /etc/fstab << "EOF"
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# Begin /etc/fstab
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# file system mount-point fs-type options dump fsck-order
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/dev/<replaceable>[xxx]</replaceable> / <replaceable>[fff]</replaceable> defaults 1 1
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/dev/<replaceable>[yyy]</replaceable> swap swap pri=1 0 0
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proc /proc proc defaults 0 0
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sysfs /sys sysfs defaults 0 0
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devpts /dev/pts devpts gid=4,mode=620 0 0
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shm /dev/shm tmpfs defaults 0 0
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# End /etc/fstab
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EOF</userinput></screen>
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<para>Replace <replaceable>[xxx]</replaceable>,
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<replaceable>[yyy]</replaceable> and <replaceable>[fff]</replaceable>
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with the values appropriate for the system. For example, <filename
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class="partition">hda2</filename>, <filename
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class="partition">hda5</filename>, and <systemitem
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class="filesystem">reiserfs</systemitem>. For details on the six
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fields in this file, see <command>man 5 fstab</command>.</para>
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<para>When using a reiserfs partition, the <parameter>1 1</parameter>
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at the end of the line should be replaced with <parameter>0
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0</parameter> because such a partition does not need to be dumped or
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checked.</para>
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<para>The <filename class="directory">/dev/shm</filename> mount point
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for <systemitem class="filesystem">tmpfs</systemitem> is included to
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allow enabling POSIX shared memory. The kernel must have the required
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support built into it for this to work (more about this in the next
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section). Please note that very little software currently uses POSIX
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shared memory. Therefore, consider the <filename
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class="directory">/dev/shm</filename> mount point optional. For more
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information, see
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<filename>Documentation/filesystems/tmpfs.txt</filename> in the kernel
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source tree.</para>
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<para>There are other lines which may be added to the
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<filename>/etc/fstab</filename> file. One example is a line for USB
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devices:</para>
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<screen> usbfs /proc/bus/usb usbfs devgid=14,devmode=0660 0 0 </screen>
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<para>This option will only work if the <quote>Support for Host-side
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USB</quote> and <quote>USB device filesystem</quote> are compiled into
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the kernel (not as a module).</para>
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</sect1>
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