| 1 | <sect1 id="ch06-chroot">
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| 2 | <title>Entering the chroot environment</title>
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| 3 | <?dbhtml filename="chroot.html" dir="chapter06"?>
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| 4 |
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| 5 | <para>It is time to enter the chroot environment in order to begin installing
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| 6 | the packages we need. Before you can chroot, however, you need to become
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| 7 | <emphasis>root</emphasis>, since only <emphasis>root</emphasis>
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| 8 | can execute the <userinput>chroot</userinput> command.</para>
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| 9 |
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| 10 | <para>Become <emphasis>root</emphasis> and run the following command
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| 11 | to enter the chroot environment:</para>
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| 12 |
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| 13 | <para><screen><userinput>chroot $LFS /static/bin/env -i \
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| 14 | HOME=/root TERM=$TERM PS1='\u:\w\$ ' \
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| 15 | PATH=/bin:/usr/bin:/sbin:/usr/sbin:/static/bin \
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| 16 | /static/bin/bash --login</userinput></screen>
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| 17 | </para>
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| 18 |
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| 19 | <para>The <userinput>-i</userinput> option given to the
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| 20 | <userinput>env</userinput> command will clear all variables of the chroot
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| 21 | environment. After that, only the HOME, TERM, PS1 and PATH variables are
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| 22 | set again. The TERM=$TERM construct will set the TERM variable inside chroot
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| 23 | to the same value as outside chroot; this variable is needed for programs
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| 24 | like vim and less to operate properly. If you need other variables present,
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| 25 | such as CFLAGS or CXXFLAGS, this is a good place to set them again.</para>
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| 26 |
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| 27 | <para>From this point on there's no need to use the LFS variable anymore,
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| 28 | because everything you do will be restricted to the LFS file system -- since
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| 29 | what the shell thinks is <filename class="directory">/</filename> is actually
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| 30 | the value of <filename class="directory">$LFS</filename>, which was passed to
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| 31 | the chroot command.</para>
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| 32 |
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| 33 | <para>You have to make sure all the commands in the rest of this chapter and
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| 34 | in the following chapters are run from within the chroot environment.
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| 35 | If you ever leave this environment for any reason (rebooting for example),
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| 36 | you must remember to again enter chroot and mount proc (discussed later)
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| 37 | before continuing with the installations.</para>
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| 38 |
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| 39 | <para>Note that the bash prompt will say "I have no name!" This is
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| 40 | normal, as the Glibc package hasn't been installed yet.</para>
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| 41 |
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| 42 | </sect1>
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| 43 |
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