source: chapter07/introduction.xml@ aefc822

10.0 10.0-rc1 10.1 10.1-rc1 11.0 11.0-rc1 11.0-rc2 11.0-rc3 11.1 11.1-rc1 arm ml-11.0 multilib trunk xry111/clfs-ng xry111/git-transition xry111/glibc-2.34 xry111/lfs-next xry111/tester-nohack xry111/usr-move
Last change on this file since aefc822 was 387a32af, checked in by Bruce Dubbs <bdubbs@…>, 2 years ago

Update initial Chapter 7 pages for cross2 branch

git-svn-id: 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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[673b0d8]1<?xml version="1.0" encoding="ISO-8859-1"?>
[b06ca36]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "" [
[673b0d8]4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
[ce335792]8<sect1 id="ch-tools-introduction-chroot">
[d781ffb]9 <?dbhtml filename="introduction.html"?>
[d781ffb]11 <title>Introduction</title>
[387a32af]13 <para>This chapter shows how to build the last missing bits of the temporary
14 system: first, the tools needed by the build machinery of various packages,
15 then three packages needed to run tests. Now that all circular dependencies
16 have been resolved, we can use a <quote>chroot</quote> environment,
17 completely isolated the host operating system used for the build, except
18 for the running kernel.</para>
20 <para>For proper operation of the isolated environment, some communication
21 with the running kernel must be established. This is done through the
22 so-called <emphasis>Virtual Kernel File Systems</emphasis>, which must be
23 mounted when entering the chroot environment. You may want to check
[387a32af]24 that they are mounted by issuing <command>findmnt</command>.</para>
26 <para>Until <xref linkend="ch-tools-chroot"/>, the commands must be
27 run as <systemitem class="username">root</systemitem>, with the
28 <envar>LFS</envar> variable set. After entering chroot, all commands
29 are run as root, fortunately without access to the OS of the computer
[387a32af]30 you built LFS on. Be careful anyway, as it is easy to destroy the whole
[ce335792]31 LFS system with badly formed commands.</para>
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