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<?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-tools-changingowner">
<?dbhtml filename="changingowner.html"?>
<title>Changing Ownership</title>
<note>
<para>The commands in the remainder of this book must be performed while
logged in as user <systemitem class="username">root</systemitem> and no
longer as user <systemitem class="username">lfs</systemitem>. Also, double
check that <envar>$LFS</envar> is set in <systemitem
class="username">root</systemitem>'s environment.</para>
</note>
<para>Currently, the <filename class="directory">$LFS/tools</filename> directory
is owned by the user <systemitem class="username">lfs</systemitem>, a user
that exists only on the host system. If the <filename
class="directory">$LFS/tools</filename> directory is kept as is, the files are
owned by a user ID without a corresponding account. This is dangerous because
a user account created later could get this same user ID and would own the
<filename class="directory">$LFS/tools</filename> directory and all the files
therein, thus exposing these files to possible malicious manipulation.</para>
<para>To avoid this issue, you could add the <systemitem
class="username">lfs</systemitem> user to the new LFS system later when
creating the <filename>/etc/passwd</filename> file, taking care to assign it
the same user and group IDs as on the host system. Better yet, change the
ownership of the <filename class="directory">$LFS/tools</filename> directory to
user <systemitem class="username">root</systemitem> by running the following
command:</para>
<screen><userinput>chown -R root:root $LFS/tools</userinput></screen>
<para>Although the <filename class="directory">$LFS/tools</filename> directory
can be deleted once the LFS system has been finished, it can be retained to build
additional LFS systems <emphasis>of the same book version</emphasis>. How best
to backup <filename class="directory">$LFS/tools</filename> is a matter of
personal preference and is left as an exercise for the reader.</para>
<caution>
<para>If you intend to keep the temporary tools for use in building future LFS
systems, <emphasis>now</emphasis> is the time to back them up. Subsequent
commands in chapter 6 will alter the tools currently in place, rendering them
useless for future builds.</para>
</caution>
</sect1>
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