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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/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>$LFS</envar> is set in <systemitem
class="username">root</systemitem>'s environment.</para>
</note>
<para>Currently, the whole directory hierarchy in <filename
class="directory">$LFS</filename>
is owned by the user <systemitem class="username">lfs</systemitem>, a user
that exists only on the host system. If the directories under <filename
class="directory">$LFS</filename> are kept as they are, the files are
owned by a user ID without a corresponding account. This is dangerous because
a user account created later could get this same user ID and would own all
the files under <filename class="directory">$LFS</filename>, 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/*</filename> directories to
user <systemitem class="username">root</systemitem> by running the following
command:</para>
<screen><userinput>chown -R root:root $LFS/{usr,lib,var,etc,bin,sbin,lib64,tools}</userinput></screen>
</sect1>
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