| 1 | <sect1 id="ch08-lilo">
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| 2 | <title>Making the LFS system bootable</title>
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| 3 |
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| 4 | <para>In order to be able to boot the LFS system, we need to update our
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| 5 | bootloader. We're assuming that your host system is using Lilo (since
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| 6 | that's the most commonly used boot loader at the moment).</para>
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| 7 |
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| 8 | <para>We will not be running the lilo program inside chroot. Running lilo
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| 9 | inside chroot can have fatal side-effects which render your MBR useless
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| 10 | and you'd need a boot disk to be able to start any Linux system (either
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| 11 | the host system or the LFS system).</para>
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| 12 |
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| 13 | <para>First we'll exit chroot and copy the lfskernel file to the host
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| 14 | system:</para>
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| 15 |
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| 16 | <para><screen><userinput>logout</userinput>
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| 17 | <userinput>cp $LFS/boot/lfskernel /boot</userinput></screen></para>
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| 18 |
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| 19 | <para>The next step is adding an entry to /etc/lilo.conf so that we can
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| 20 | choose LFS when booting the computer:</para>
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| 21 |
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| 22 | <para><screen><userinput>cat >> /etc/lilo.conf << "EOF"</userinput>
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| 23 | image=/boot/lfskernel
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| 24 | label=lfs
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| 25 | root=<partition>
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| 26 | read-only
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| 27 | <userinput>EOF</userinput></screen></para>
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| 28 |
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| 29 | <para><partition> must be replaced by the LFS
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| 30 | partition's designation.</para>
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| 31 |
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| 32 | <para>Now the boot loader gets updated by running:</para>
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| 33 |
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| 34 | <para><screen><userinput>/sbin/lilo</userinput></screen></para>
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| 35 |
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| 36 | <para>The last step is syncing the host system lilo config. files with the
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| 37 | LFS system:</para>
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| 38 |
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| 39 | <para><screen><userinput>cp /etc/lilo.conf $LFS/etc &&</userinput>
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| 40 | <userinput>cp <kernel images> $LFS/boot</userinput></screen></para>
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| 41 |
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| 42 | <para>To find out which kernel images files are being used, look at the
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| 43 | /etc/lilo.conf file and find the lines starting with
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| 44 | <emphasis>image=</emphasis>. If your host system has kernel files in
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| 45 | other places than the /boot directory, make sure you update the paths
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| 46 | in the $LFS/etc/lilo.conf file so that it does look for them in the
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| 47 | /boot directory.</para>
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| 48 |
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| 49 | <para>As soon as we have booted into LFS we can run
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| 50 | <userinput>/sbin/lilo</userinput> from the LFS system in order to have
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| 51 | the latest Lilo version in the MBR.</para>
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| 52 |
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| 53 | </sect1>
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| 54 |
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