| 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>
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| 5 | In order to being able to boot the LFS system, we need to update our
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| 6 | bootloader. We're assuming that your host system is using Lilo (since
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| 7 | that's the most commonly used boot loader at the moment).
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| 8 | </para>
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| 9 |
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| 10 | <para>
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| 11 | We will not be running the lilo program inside chroot. Running lilo
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| 12 | inside chroot can have fatal side-effects which render your MBR useles
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| 13 | and you'd need a boot disk to be able to start any Linux system (either
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| 14 | the host system or the LFS system).
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| 15 | </para>
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| 16 |
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| 17 | <para>
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| 18 | First we'll exit chroot and copy the lfskernel file to the host system:
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| 19 | </para>
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| 20 |
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| 21 | <blockquote><literallayout>
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| 22 |
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| 23 | <userinput>logout</userinput>
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| 24 | <userinput>cp $LFS/boot/lfskernel /boot</userinput>
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| 25 |
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| 26 | </literallayout></blockquote>
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| 27 |
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| 28 | <para>
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| 29 | The next step is adding an entry to /etc/lilo.conf so that we can
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| 30 | choose LFS when booting the computer:
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| 31 | </para>
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| 32 |
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| 33 | <literallayout>
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| 34 |
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| 35 | <userinput>cat >> /etc/lilo.conf << "EOF"</userinput>
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| 36 | image=/boot/lfskernel
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| 37 | label=lfs
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| 38 | root=<partition>
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| 39 | read-only
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| 40 | <userinput>EOF</userinput>
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| 41 |
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| 42 | </literallayout>
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| 43 |
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| 44 | <para>
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| 45 | <partition> must be replaced by the LFS partition's designation.
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| 46 | </para>
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| 47 |
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| 48 | <para>
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| 49 | Now the boot loader gets updated by running:
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| 50 | </para>
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| 51 |
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| 52 | <blockquote><literallayout>
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| 53 |
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| 54 | <userinput>/sbin/lilo</userinput>
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| 55 |
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| 56 | </literallayout></blockquote>
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| 57 |
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| 58 | <para>
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| 59 | The last step is syncing the host system lilo config. files with the
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| 60 | LFS system:
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| 61 | </para>
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| 62 |
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| 63 | <blockquote><literallayout>
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| 64 |
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| 65 | <userinput>cp /etc/lilo.conf $LFS/etc &&</userinput>
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| 66 | <userinput>cp <kernel images> $LFS/boot</userinput>
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| 67 |
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| 68 | </literallayout></blockquote>
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| 69 |
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| 70 | <para>
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| 71 | To find out which kernel images files are being used, look at the
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| 72 | /etc/lilo.conf file and find the lines starting with
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| 73 | <emphasis>image=</emphasis>. If your host system has kernel files in
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| 74 | other places than the /boot directory, make sure you update the paths
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| 75 | in the $LFS/etc/lilo.conf file so that it does look for them in the
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| 76 | /boot directory.
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| 77 | </para>
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| 78 |
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| 79 | <para>
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| 80 | As soon as we have booted into LFS we can run
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| 81 | <userinput>/sbin/lilo</userinput> from the LFS system in order to have
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| 82 | the latest Lilo version in the MBR.
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| 83 | </para>
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| 84 |
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| 85 | </sect1>
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| 86 |
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