1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
<sect1 id="ch08-grub">
<title>Making the LFS system bootable</title>
<?dbhtml filename="grub.html" dir="chapter08"?>
<para>Now that we have our shiny new Linux-From-Scratch system completed,
we need to ensure we can boot it. To do this, we will run the
<userinput>grub</userinput> program.</para>
<screen><userinput>grub</userinput></screen>
<para>Grub uses its own naming structure for drives and partitions, in the form
of (hdn,m), where <emphasis>n</emphasis> is the hard drive number, and
<emphasis>m</emphasis> the partition number, both starting from zero. This
means, for instance, that partition <filename>hda1</filename> is (hd0,0) to
Grub, and <filename>hdb2</filename> is (hd1,1). In contrast to Linux, Grub
doesn't consider CD-ROM drives to be hard drives, so if you have a CD on
<filename>hdb</filename>, for example, and a second hard drive on
<filename>hdc</filename>, that second hard drive would still be (hd1).</para>
<para>Using the above information, determine the appropriate designator for
your root partition. For the following example, we'll assume your root
partition is <filename>hda4</filename>.</para>
<para>First, tell Grub where to search for its <filename>stage{1,2}</filename>
files -- you can use Tab everywhere to make Grub show the alternatives:</para>
<screen><userinput>root (hd0,3)</userinput></screen>
<para>Then tell it to install itself into the MBR (Master Boot Record) of
<filename>hda</filename>:</para>
<screen><userinput>setup (hd0)</userinput></screen>
<para>If all is well, Grub will have reported finding its files in
<filename>/boot/grub</filename>. That's all there was to it:</para>
<screen><userinput>quit</userinput></screen>
<para>Now we need to create the <filename>menu.lst</filename> file, which
defines Grub's boot menu:</para>
<screen><userinput>cat > /boot/grub/menu.lst << "EOF"</userinput>
# Begin /boot/grub/menu.lst
# By default boot the first menu entry.
default 0
# Allow 30 seconds before booting the default.
timeout 30
# Use prettier colors.
color green/black light-green/black
# The first entry is for LFS.
title LFS 5.0
root (hd0,3)
kernel /boot/lfskernel root=/dev/hda4 ro
<userinput>EOF</userinput></screen>
<para>You may want to add an entry for your host distribution. It might look
like this:</para>
<screen><userinput>cat >> /boot/grub/menu.lst << "EOF"</userinput>
title Red Hat
root (hd0,2)
kernel /boot/kernel-2.4.20 root=/dev/hda3 ro
initrd /boot/initrd-2.4.20
<userinput>EOF</userinput></screen>
<para>Also, if you happen to dual-boot Windows, the following entry should
allow booting it:</para>
<screen><userinput>cat >> /boot/grub/menu.lst << "EOF"</userinput>
title Windows
rootnoverify (hd0,0)
chainloader +1
<userinput>EOF</userinput></screen>
<para>If <userinput>info grub</userinput> doesn't tell you all you want to
know, you can find more information regarding Grub on its website, located at:
<ulink url="http://www.gnu.org/software/grub"/>.</para>
</sect1>
|
