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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../../general.ent">
%general-entities;
]>
<sect1 id="ch-bootable-fstab">
<?dbhtml filename="fstab.html"?>
<title>Creating the /etc/fstab File</title>
<indexterm zone="ch-bootable-fstab">
<primary sortas="e-/etc/fstab">/etc/fstab</primary>
</indexterm>
<para os="a">The <filename>/etc/fstab</filename> file is used by some
programs to determine where file systems are to be mounted by default,
in which order, and which must be checked (for integrity errors) prior
to mounting. Create a new file systems table like this:</para>
<screen><userinput>cat > ${CLFS}/etc/fstab << "EOF"
<literal># Begin /etc/fstab
# file system mount-point type options dump fsck
# order
/dev/<replaceable>[xxx]</replaceable> / <replaceable>[fff]</replaceable> defaults 1 1
/dev/<replaceable>[yyy]</replaceable> swap swap pri=1 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
devpts /dev/pts devpts gid=4,mode=620 0 0
shm /dev/shm tmpfs defaults 0 0
# End /etc/fstab</literal>
EOF</userinput></screen>
<para os="b">Replace <replaceable>[xxx]</replaceable>,
<replaceable>[yyy]</replaceable>, and <replaceable>[fff]</replaceable>
with the values appropriate for the system, for example, <filename
class="partition">hda2</filename>, <filename
class="partition">hda5</filename>, and <systemitem
class="filesystem">ext2</systemitem>. For details on the six
fields in this file, see <command>man 5 fstab</command>.</para>
<para os="c">The <filename class="directory">/dev/shm</filename> mount point
for <systemitem class="filesystem">tmpfs</systemitem> is included to
allow enabling POSIX-shared memory. The kernel must have the required
support built into it for this to work (more about this is in the next
section). Please note that very little software currently uses
POSIX-shared memory. Therefore, consider the <filename
class="directory">/dev/shm</filename> mount point optional. For more
information, see <filename>Documentation/filesystems/tmpfs.txt</filename>
in the kernel source tree.</para>
</sect1>