source: BOOK/chroot/common/changingowner.xml @ 07114c98

Last change on this file since 07114c98 was fb40919, checked in by Chris Staub <chris@…>, 16 years ago

Changed many 'LFS' references to 'CLFS'

  • Property mode set to 100644
File size: 2.2 KB
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3  "" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
8<sect1 id="ch-chroot-changingowner">
9  <?dbhtml filename="changingowner.html"?>
11  <title>Changing Ownership</title>
13    <para os="a">Currently, the <filename class="directory">/tools</filename>
14    and <filename class="directory">/cross-tools</filename> directories
15    are owned by the user <emphasis>lfs</emphasis>, a user that
16    exists only on the host system. Although the <filename
17    class="directory">/tools</filename> and <filename
18    class="directory">/cross-tools</filename> directories can be deleted
19    once the CLFS system has been finished, they can be retained to build
20    additional CLFS systems. If the <filename class="directory">/tools</filename>
21    and <filename class="directory">/cross-tools</filename> directories are
22    kept as is, the files are owned by a user ID without a corresponding
23    account. This is dangerous because a user account created later could
24    get this same user ID and would own the <filename
25    class="directory">/tools</filename> directory and all the files therein,
26    thus exposing these files to possible malicious manipulation.</para>
28    <para os="b">To avoid this issue, add the <systemitem
29    class="username">lfs</systemitem> user to the new CLFS system later when
30    creating the <filename>/etc/passwd</filename> file, taking care to assign
31    it the same user and group IDs as on the host system. Alternatively,
32    assign the contents of the <filename class="directory">/tools</filename>
33    and <filename class="directory">/cross-tools</filename> directories to
34    user <systemitem class="username">root</systemitem> by running the
35    following commands:</para>
37<screen os="c"><userinput>chown -Rv 0:0 /tools
38chown -Rv 0:0 /cross-tools</userinput></screen>
40    <para os="d">The commands use <parameter>0:0</parameter> instead of
41    <parameter>root:root</parameter>, because <command>chown</command>
42    is unable to resolve the name <quote>root</quote> until the
43    <filename>passwd</filename> file has been created.</para>
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