source: BOOK/boot/common/changingowner.xml@ 30d14492

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<!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">
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<sect1 id="ch-boot-changingowner">
  <?dbhtml filename="changingowner.html"?>

  <title>Changing Ownership</title>

  <para os="a">Currently, the <filename class="directory">/tools</filename>
  and <filename class="directory">/cross-tools</filename> directories
  are owned by the user <emphasis>clfs</emphasis>, a user that
  exists only on the host system. Although <filename
  class="directory">/tools</filename> and <filename
  class="directory">/cross-tools</filename> can be deleted once the CLFS
  system has been finished, they can be retained to build
  additional CLFS systems. If the <filename class="directory">/tools</filename>
  and <filename class="directory">/cross-tools</filename> directories are
  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 these directories and all the files
  therein, thus exposing those files to possible malicious manipulation.</para>

  <para os="b">One possible fix for this issue might be to add the
  <systemitem class="username">clfs</systemitem> user to the new CLFS 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. Alternatively,
  assign the contents of the <filename class="directory">/tools</filename>
  and <filename class="directory">/cross-tools</filename> directories to
  user <systemitem class="username">root</systemitem> by running the
  following commands:</para>

<screen os="c"><userinput>chown -Rv 0:0 ${CLFS}/tools
chown -Rv 0:0 ${CLFS}/cross-tools</userinput></screen>

</sect1>