1 <sect1 id="ch08-kernel">
2 <title>Installing Linux-&kernel-version;</title>
3 <?dbhtml filename="kernel.html" dir="chapter08"?>
5 <screen>Estimated build time: &kernel-time;
6 Estimated required disk space: &kernel-compsize;</screen>
8 <para>Building the kernel involves a few steps: configuring it and compiling
9 it. There are a few ways to configure the kernel. If you don't like the
10 way this book does it, read the <filename>README</filename> that comes
11 with the kernel source tree, and find out what the other options are.</para>
13 <para>Something you could do, is take the <filename>.config</filename>
14 file from your host distribution's kernel source tree and copy it to
15 <filename class="directory">$LFS/usr/src/linux-&kernel-version;</filename>.
16 This way you don't have to configure the entire kernel from scratch and
17 can use your current values. If you choose to do this, first run the
18 <userinput>make mrproper</userinput> command below, then copy the
19 <filename>.config</filename> file over, then run
20 <userinput>make menuconfig</userinput> followed by the rest of the commands
21 (<userinput>make oldconfig</userinput> may be better in some situations.
22 See the <filename>README</filename> file for more details when to use
23 <userinput>make oldconfig</userinput>).</para>
25 <para>If you intend to use kernel modules, you will need an
26 <filename>/etc/modules.conf</filename> file. Information pertaining
27 to modules and to kernel configuration in general may be found in the
28 kernel documentation, which is stored stored in
29 <filename>/usr/src/linux-&kernel-version;/Documentation</filename>. The
30 modules.conf man page and the kernel HOWTO at
31 <ulink url="http://www.tldp.org/HOWTO/Kernel-HOWTO.html"/> may also be of
32 interest to you.</para>
34 <para>The following commands are run to build the kernel:</para>
36 <para><screen><userinput>cd /usr/src/linux-&kernel-version; &&</userinput>
37 <userinput>make mrproper &&</userinput>
38 <userinput>make menuconfig &&</userinput>
39 <userinput>make dep &&</userinput>
40 <userinput>make bzImage &&</userinput>
41 <userinput>make modules &&</userinput>
42 <userinput>make modules_install &&</userinput>
43 <userinput>cp arch/i386/boot/bzImage /boot/lfskernel &&</userinput>
44 <userinput>cp System.map /boot</userinput></screen></para>
46 <para>Note: the arch/i386/boot/bzImage path may vary on
47 different platforms.</para>