source: chapter07/introduction.xml@ 36cb08f

11.3 11.3-rc1 multilib trunk xry111/arm64 xry111/clfs-ng xry111/glibc-2.37 xry111/kcfg-revise xry111/pip3 xry111/rust-wip-20221008
Last change on this file since 36cb08f was 52ddd6c, checked in by David Bryant <davidbryant@…>, 6 months ago

Clarify some things in Intro to chroot; simplify some verbiage.

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