1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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5 | %general-entities;
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6 | ]>
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7 |
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8 | <sect1 id="ch-tools-changingowner">
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9 | <?dbhtml filename="changingowner.html"?>
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10 |
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11 | <title>Changing Ownership</title>
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12 |
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13 | <note>
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14 | <para>The commands in the remainder of this book must be performed while
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15 | logged in as user <systemitem class="username">root</systemitem> and no
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16 | longer as user <systemitem class="username">lfs</systemitem>. Also, double
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17 | check that <envar>$LFS</envar> is set in <systemitem
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18 | class="username">root</systemitem>'s environment.</para>
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19 | </note>
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20 |
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21 | <para>Currently, the <filename class="directory">$LFS/tools</filename> directory
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22 | is owned by the user <systemitem class="username">lfs</systemitem>, a user
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23 | that exists only on the host system. If the <filename
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24 | class="directory">$LFS/tools</filename> directory is kept as is, the files are
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25 | owned by a user ID without a corresponding account. This is dangerous because
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26 | a user account created later could get this same user ID and would own the
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27 | <filename class="directory">$LFS/tools</filename> directory and all the files
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28 | therein, thus exposing these files to possible malicious manipulation.</para>
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29 |
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30 | <para>To avoid this issue, you could add the <systemitem
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31 | class="username">lfs</systemitem> user to the new LFS system later when
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32 | creating the <filename>/etc/passwd</filename> file, taking care to assign it
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33 | the same user and group IDs as on the host system. Better yet, change the
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34 | ownership of the <filename class="directory">$LFS/tools</filename> directory to
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35 | user <systemitem class="username">root</systemitem> by running the following
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36 | command:</para>
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37 |
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38 | <screen><userinput>chown -R root:root $LFS/tools</userinput></screen>
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39 |
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40 | <para>Although the <filename class="directory">$LFS/tools</filename> directory
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41 | can be deleted once the LFS system has been finished, it can be retained to build
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42 | additional LFS systems <emphasis>of the same book version</emphasis>. How best
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43 | to backup <filename class="directory">$LFS/tools</filename> is a matter of
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44 | personal preference and is left as an exercise for the reader.</para>
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45 |
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46 | </sect1>
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