source: chroot/common/changingowner.xml@ 0189731

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;
]>

<sect1 id="ch-chroot-changingowner">
  <?dbhtml filename="changingowner.html"?>

  <title>Changing Ownership</title>

    <para>Currently, the <filename class="directory">/tools</filename>
    and <filename class="directory">/cross-tools</filename> directories
    are owned by the user <emphasis>lfs</emphasis>, a user that
    exists only on the host system. Although the <filename
    class="directory">/tools</filename> and <filename
    class="directory">/cross-tools</filename> directories can be deleted
    once the LFS system has been finished, they can be retained to build
    additional LFS systems. If the <filename class="directory">/tools</filename>
    and <filename class="directory">/cross-tools</filename> directories are
    kept as is, the files are owned by a user ID without a corresponding
    account. This is dangerous because a user account created later could
    get this same user ID and would own the <filename
    class="directory">/tools</filename> directory and all the files therein,
    thus exposing these files to possible malicious manipulation.</para>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../boot/common/changingowner.xml"
    xpointer="xpointer(//*[@os='c'])"/>

<screen><userinput>chown -Rv 0:0 /tools
chown -Rv 0:0 /cross-tools</userinput></screen>

    <para>The commands use <parameter>0:0</parameter> instead of
    <parameter>root:root</parameter>, because <command>chown</command>
    is unable to resolve the name <quote>root</quote> until the
    <filename>passwd</filename> file has been created.</para>

</sect1>