| 1 | <sect1 id="ch08-fstab">
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| 2 | <title>Creating the /etc/fstab file</title>
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| 3 | <?dbhtml filename="fstab.html" dir="chapter08"?>
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| 4 |
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| 5 | <para>The <filename>/etc/fstab</filename> file is used by some programs to
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| 6 | determine where partitions are to be mounted by default, which file systems
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| 7 | must be checked and in which order. Create a new file systems table like
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| 8 | this:</para>
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| 9 |
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| 10 | <screen><userinput>cat > /etc/fstab << "EOF"</userinput>
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| 11 | # Begin /etc/fstab
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| 12 |
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| 13 | # filesystem mount-point fs-type options dump fsck-order
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| 14 |
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| 15 | /dev/xxx / fff defaults 1 1
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| 16 | /dev/yyy swap swap pri=1 0 0
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| 17 | proc /proc proc defaults 0 0
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| 18 | devpts /dev/pts devpts gid=4,mode=620 0 0
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| 19 | shm /dev/shm tmpfs defaults 0 0
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| 20 |
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| 21 | # End /etc/fstab
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| 22 | <userinput>EOF</userinput></screen>
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| 23 |
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| 24 | <para>Of course, replace <filename>xxx</filename>, <filename>yyy</filename>
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| 25 | and <filename>fff</filename> with the values appropriate for your system --
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| 26 | for example <filename>hda2</filename>, <filename>hda5</filename> and
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| 27 | <filename>reiserfs</filename>. For all the details on the six fields in this
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| 28 | table, see <userinput>man 5 fstab</userinput>.</para>
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| 29 |
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| 30 | <para>When using a reiserfs partition, the <emphasis>1 1</emphasis> at the
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| 31 | end of the line should be replaced with <emphasis>0 0</emphasis>, as such a
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| 32 | partition does not need to be dumped or checked</para>
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| 33 |
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| 34 | <para>The <filename>/dev/shm</filename> mount point for tmpfs is included to
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| 35 | enable POSIX shared memory. Your kernel must have the required support built
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| 36 | into it for this to work. More about this in the next section. Please note that
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| 37 | currently, very little software actually uses POSIX shared memory. Therefore you
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| 38 | can consider the <filename>/dev/shm</filename> mount optional. For more
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| 39 | information, see <filename>Documentation/filesystems/tmpfs.txt</filename> in the
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| 40 | kernel source tree.</para>
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| 41 |
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| 42 | <para>There are other lines which you may consider adding to your
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| 43 | <filename>fstab</filename> file. One example is a line to use if you intend to
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| 44 | use USB devices:</para>
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| 45 |
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| 46 | <screen>usbfs /proc/bus/usb usbfs defaults 0 0</screen>
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| 47 |
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| 48 | <para>This option will of course only work if you have the relevant support
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| 49 | compiled into your kernel.</para>
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| 50 |
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| 51 | </sect1>
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| 52 |
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