[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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| 6 | <sect1 id="ch-system-changingowner">
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| 7 | <title>Changing ownership</title>
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| 8 | <?dbhtml filename="changingowner.html"?>
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| 9 |
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| 10 | <para>Right now the <filename class="directory">/tools</filename> directory
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| 11 | is owned by the user <emphasis>lfs</emphasis>, a user that exists only on your
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| 12 | host system. Although you will probably want to delete the
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| 13 | <filename class="directory">/tools</filename> directory once you have
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| 14 | finished your LFS system, you may want to keep it around, for example to
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| 15 | build more LFS systems. But if you keep the
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| 16 | <filename class="directory">/tools</filename> directory as it is, you end up
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| 17 | with files owned by a user ID without a corresponding account. This is
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| 18 | dangerous because a user account created later on could get this same user ID
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| 19 | and would suddenly own the <filename class="directory">/tools</filename>
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| 20 | directory and all the files therein, thus exposing these files to possible
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| 21 | malicious manipulation.</para>
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| 22 |
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| 23 | <para>To avoid this issue, you could add the <emphasis>lfs</emphasis> user to
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| 24 | your new LFS system later on when creating the <filename>/etc/passwd</filename>
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| 25 | file, taking care to assign it the same user and group IDs as on your host
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| 26 | system. Alternatively, you can (and the book assumes you do) assign the
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| 27 | contents of the <filename class="directory">/tools</filename> directory to
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| 28 | user <emphasis>root</emphasis> by running the following command:</para>
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| 29 |
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| 30 | <screen><userinput>chown -R 0:0 /tools</userinput></screen>
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| 31 |
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[3c928f1] | 32 | <para>The command uses <parameter>0:0</parameter> instead of <parameter>root:root</parameter>,
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[673b0d8] | 33 | because <userinput>chown</userinput> is unable to resolve the name
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| 34 | <quote>root</quote> until the password file has been created.</para>
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| 35 |
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| 36 | </sect1>
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