1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!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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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 programs to
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13 | determine where file systems are to be mounted by default, which
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14 | must be checked and in which order. Create a new file systems table like
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15 | this:</para>
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16 |
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17 | <screen><userinput>cat > /etc/fstab << "EOF"</userinput>
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18 | # Begin /etc/fstab
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19 |
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20 | # file system mount-point fs-type options dump fsck-order
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21 |
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22 | /dev/xxx / fff defaults 1 1
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23 | /dev/yyy swap swap pri=1 0 0
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24 | proc /proc proc defaults 0 0
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25 | sysfs /sys sysfs defaults 0 0
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26 | devpts /dev/pts devpts gid=4,mode=620 0 0
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27 | shm /dev/shm tmpfs defaults 0 0
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28 | # End /etc/fstab
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29 | <userinput>EOF</userinput></screen>
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30 |
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31 | <para>Of course, replace <filename>xxx</filename>, <filename>yyy</filename>
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32 | and <filename>fff</filename> with the values appropriate for your system --
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33 | for example <filename>hda2</filename>, <filename>hda5</filename> and
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34 | <filename>reiserfs</filename>. For all the details on the six fields in this
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35 | table, see <command>man 5 fstab</command>.</para>
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36 |
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37 | <para>When using a reiserfs partition, the <emphasis>1 1</emphasis> at the
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38 | end of the line should be replaced with <emphasis>0 0</emphasis>, as such a
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39 | partition does not need to be dumped or checked</para>
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40 |
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41 | <para>The <filename>/dev/shm</filename> mount point for tmpfs is included to
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42 | allow enabling POSIX shared memory. Your kernel must have the required support
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43 | built into it for this to work -- more about this in the next section. Please
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44 | note that currently very little software actually uses POSIX shared memory.
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45 | Therefore you can consider the <filename>/dev/shm</filename> mount point
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46 | optional. For more information, see
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47 | <filename>Documentation/filesystems/tmpfs.txt</filename> in the kernel source
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48 | tree.</para>
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49 |
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50 | <para>There are other lines which you may consider adding to your
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51 | <filename>fstab</filename> file. One example is a line to use if you intend to
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52 | use USB devices:</para>
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53 |
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54 | <screen> usbfs /proc/bus/usb usbfs devgid=14,devmode=0660 0 0 </screen>
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55 |
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56 | <para>This option will of course only work if you have the
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57 | "Support for Host-side USB" and "USB device filesystem"
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58 | compiled into your kernel (not as a module).</para>
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59 |
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60 | </sect1>
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