lfs-book/chapter06/changingowner.xml

<sect1 id="ch06-changingowner">
<title>Changing ownership</title>
<?dbhtml filename="changingowner.html" dir="chapter06"?>

<para>Right now the <filename class="directory">/tools</filename> directory
is owned by the user <emphasis>lfs</emphasis>, a user that exists only on your
host system. Although you will probably want to delete the
<filename class="directory">/tools</filename> directory once you have
finished your LFS system, you may want to keep it around, for example to
build more LFS systems. But if you keep the
<filename class="directory">/tools</filename> directory as it is, you end up
with files owned by a user ID without a corresponding account. This is
dangerous because a user account created later on could get this same user ID
and would suddenly own the <filename class="directory">/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 <emphasis>lfs</emphasis> user to
your new LFS system later on when creating the <filename>/etc/passwd</filename>
file, taking care to assign it the same user and group IDs as on your host
system. Alternatively, you can (and the book assumes you do) assign the
contents of the <filename class="directory">/tools</filename> directory to
user <emphasis>root</emphasis> by running the following command:</para>

<screen><userinput>chown -R 0:0 /tools</userinput></screen>

<para>The command uses "0:0" instead of "root:root", because
<userinput>chown</userinput> is unable to resolve the name "root" until the
password file has been created.</para>

</sect1>