| 1 | <sect1 id="ch06-chroot">
|
|---|
| 2 | <title>Entering the chroot environment</title>
|
|---|
| 3 | <?dbhtml filename="chroot.html" dir="chapter06"?>
|
|---|
| 4 |
|
|---|
| 5 | <para>It is time to enter the chroot environment in order to begin installing
|
|---|
| 6 | the packages we need. Before you can chroot, however, you need to become
|
|---|
| 7 | <emphasis>root</emphasis>, since only <emphasis>root</emphasis>
|
|---|
| 8 | can execute the <userinput>chroot</userinput> command.</para>
|
|---|
| 9 |
|
|---|
| 10 | <para>Become <emphasis>root</emphasis> and run the following command
|
|---|
| 11 | to enter the chroot environment:</para>
|
|---|
| 12 |
|
|---|
| 13 | <para><screen><userinput>chroot $LFS /static/bin/env -i \
|
|---|
| 14 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
|
|---|
| 15 | PATH=/bin:/usr/bin:/sbin:/usr/sbin:/static/bin \
|
|---|
| 16 | /static/bin/bash --login</userinput></screen>
|
|---|
| 17 | </para>
|
|---|
| 18 |
|
|---|
| 19 | <para>The <userinput>-i</userinput> option given to the
|
|---|
| 20 | <userinput>env</userinput> command will clear all variables of the chroot
|
|---|
| 21 | environment. After that, only the HOME, TERM, PS1 and PATH variables are
|
|---|
| 22 | set again. The TERM=$TERM construct will set the TERM variable inside chroot
|
|---|
| 23 | to the same value as outside chroot; this variable is needed for programs
|
|---|
| 24 | like vim and less to operate properly. If you need other variables present,
|
|---|
| 25 | such as CFLAGS or CXXFLAGS, this is a good place to set them again.</para>
|
|---|
| 26 |
|
|---|
| 27 | <para>From this point on there's no need anymore to use the LFS variable,
|
|---|
| 28 | because everything you do will be restricted to the LFS file system -- since
|
|---|
| 29 | what the shell thinks is <filename class="directory">/</filename> is actually
|
|---|
| 30 | <filename class="directory">/mnt/lfs</filename>.</para>
|
|---|
| 31 |
|
|---|
| 32 | <para>You have to make sure all the commands in the rest of this chapter and
|
|---|
| 33 | in the following chapters are run from within the chroot environment.
|
|---|
| 34 | If you ever leave this environment for any reason (rebooting for example),
|
|---|
| 35 | you must remember to again enter chroot and mount proc (discussed later)
|
|---|
| 36 | before continuing with the installations.</para>
|
|---|
| 37 |
|
|---|
| 38 | <para>Note that the bash prompt will say "I have no name!" This is
|
|---|
| 39 | normal, as the Glibc package hasn't been installed yet.</para>
|
|---|
| 40 |
|
|---|
| 41 | </sect1>
|
|---|
| 42 |
|
|---|
