| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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| 6 | <sect1 id="ch-bootable-fstab">
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| 7 | <title>Creating the /etc/fstab File</title>
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| 8 | <?dbhtml filename="fstab.html"?>
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| 9 |
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| 10 | <indexterm zone="ch-bootable-fstab"><primary sortas="e-/etc/fstab">/etc/fstab</primary></indexterm>
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| 11 |
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| 12 | <para>The <filename>/etc/fstab</filename> file is used by some
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| 13 | programs to determine where file systems are to be mounted by default,
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| 14 | which must be checked, and in which order. Create a new file systems
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| 15 | table like this:</para>
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| 16 |
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| 17 | <screen><userinput>cat > /etc/fstab << "EOF"
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| 18 | <literal># Begin /etc/fstab
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| 19 |
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| 20 | # file system mount-point type options dump fsck
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| 21 | # order
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| 22 |
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| 23 | /dev/<replaceable>[xxx]</replaceable> / <replaceable>[fff]</replaceable> defaults 1 1
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| 24 | /dev/<replaceable>[yyy]</replaceable> swap swap pri=1 0 0
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| 25 | proc /proc proc defaults 0 0
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| 26 | sysfs /sys sysfs defaults 0 0
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| 27 | devpts /dev/pts devpts gid=4,mode=620 0 0
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| 28 | shm /dev/shm tmpfs defaults 0 0
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| 29 | # End /etc/fstab</literal>
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| 30 | EOF</userinput></screen>
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| 31 |
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| 32 | <para>Replace <replaceable>[xxx]</replaceable>,
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| 33 | <replaceable>[yyy]</replaceable>, and <replaceable>[fff]</replaceable>
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| 34 | with the values appropriate for the system, for example, <filename
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| 35 | class="partition">hda2</filename>, <filename
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| 36 | class="partition">hda5</filename>, and <systemitem
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| 37 | class="filesystem">ext2</systemitem>. For details on the six
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| 38 | fields in this file, see <command>man 5 fstab</command>.</para>
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| 39 |
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| 40 | <para>When using a journalling file system, the <parameter>1
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| 41 | 1</parameter> at the end of the line should be replaced with
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| 42 | <parameter>0 0</parameter> because such a partition does not need to
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| 43 | be dumped or checked.</para>
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| 44 |
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| 45 | <para>The <filename class="directory">/dev/shm</filename> mount point
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| 46 | for <systemitem class="filesystem">tmpfs</systemitem> is included to
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| 47 | allow enabling POSIX-shared memory. The kernel must have the required
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| 48 | support built into it for this to work (more about this is in the next
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| 49 | section). Please note that very little software currently uses
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| 50 | POSIX-shared memory. Therefore, consider the <filename
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| 51 | class="directory">/dev/shm</filename> mount point optional. For more
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| 52 | information, see
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| 53 | <filename>Documentation/filesystems/tmpfs.txt</filename> in the kernel
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| 54 | source tree.</para>
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| 55 |
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| 56 | <para>There are other lines which may be added to the
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| 57 | <filename>/etc/fstab</filename> file. One example is a line for USB
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| 58 | devices:</para>
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| 59 |
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| 60 | <screen>usbfs /proc/bus/usb usbfs devgid=14,devmode=0660 0 0 </screen>
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| 61 |
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| 62 | <para>This option will only work if <quote>Support for Host-side USB</quote> and
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| 63 | <quote>USB device filesystem</quote> are compiled into the kernel or if compiled
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| 64 | as modules, that the modules are listed in
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| 65 | <filename>/etc/sysconfig/modules</filename>.</para>
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| 66 |
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| 67 | </sect1>
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| 68 |
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