| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE section [
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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 | <section xmlns="http://docbook.org/docbook-ng"
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| 7 | xml:id="ch-bootable-fstab">
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| 8 | <info><title>Creating the /etc/fstab file</title></info>
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| 9 | <?dbhtml filename="fstab.html"?>
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| 10 |
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| 11 | <indexterm zone="ch-bootable-fstab"><primary sortas="e-/etc/fstab">/etc/fstab</primary></indexterm>
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| 12 |
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| 13 | <para>The <filename>/etc/fstab</filename> file is used by some programs to
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| 14 | determine where file systems are to be mounted by default, which
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| 15 | must be checked and in which order. Create a new file systems table like
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| 16 | this:</para>
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| 17 |
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| 18 | <screen><userinput>cat > /etc/fstab << "EOF"
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| 19 | # Begin /etc/fstab
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| 20 |
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| 21 | # file system mount-point fs-type options dump fsck-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
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| 30 | EOF</userinput></screen>
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| 31 |
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| 32 | <para>Of course, replace <replaceable>[xxx]</replaceable>, <replaceable>[yyy]</replaceable>
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| 33 | and <replaceable>[fff]</replaceable> with the values appropriate for your system --
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| 34 | for example <filename class="partition">hda2</filename>, <filename class="partition">hda5</filename> and
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| 35 | <systemitem class="filesystem">reiserfs</systemitem>. For all the details on the six fields in this
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| 36 | table, see <command>man 5 fstab</command>.</para>
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| 37 |
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| 38 | <para>When using a reiserfs partition, the <parameter>1 1</parameter> at the
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| 39 | end of the line should be replaced with <parameter>0 0</parameter>, as such a
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| 40 | partition does not need to be dumped or checked</para>
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| 41 |
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| 42 | <para>The <filename class="directory">/dev/shm</filename> mount point for
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| 43 | <systemitem class="filesystem">tmpfs</systemitem> is included to
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| 44 | allow enabling POSIX shared memory. Your kernel must have the required support
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| 45 | built into it for this to work -- more about this in the next section. Please
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| 46 | note that currently very little software actually uses POSIX shared memory.
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| 47 | Therefore you can consider the <filename class="directory">/dev/shm</filename> mount point
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| 48 | optional. For more information, see
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| 49 | <filename>Documentation/filesystems/tmpfs.txt</filename> in the kernel source
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| 50 | tree.</para>
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| 51 |
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| 52 | <para>There are other lines which you may consider adding to your
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| 53 | <filename>fstab</filename> file. One example is a line to use if you intend to
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| 54 | use USB devices:</para>
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| 55 |
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| 56 | <screen> usbfs /proc/bus/usb usbfs devgid=14,devmode=0660 0 0 </screen>
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| 57 |
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| 58 | <para>This option will of course only work if you have the
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| 59 | "Support for Host-side USB" and "USB device filesystem"
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| 60 | compiled into your kernel (not as a module).</para>
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| 61 |
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| 62 | </section>
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