source: BOOK/final-preps/aboutlfs.xml@ a8f4834

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<sect1 id="ch-final-preps-aboutlfs">
  <?dbhtml filename="aboutlfs.html"?>

  <title>About $LFS</title>

  <para>Throughout this book, the environment variable <envar>LFS</envar> will
  be used several times. It is paramount that this variable is always defined.
  It should be set to the mount point chosen for the LFS partition.
  Check that the <envar>LFS</envar> variable is set up properly with:</para>

<screen><userinput>echo $LFS</userinput></screen>

  <para>Make sure the output shows the path to the LFS partition's mount
  point, which is <filename class="directory">/mnt/lfs</filename> if the
  provided example was followed. If the output is incorrect, the
  variable can be set with:</para>

<screen><userinput>export LFS=/mnt/lfs</userinput></screen>

  <para>Having this variable set is beneficial in that commands such as
  <command>install -d $LFS/tools</command> can be typed literally. The shell
  will automatically replace <quote>$LFS</quote> with
  <quote>/mnt/lfs</quote> (or whatever the variable was set to) when it
  processes the command line.</para>

  <para>If you haven't created the <filename class="directory">$LFS</filename>
  directory, do so at this time by issuing the following commands:</para>

<screen><userinput>install -dv $LFS</userinput></screen>

  <para>Do not forget to check that <envar>$LFS</envar> is set whenever
  you leave and reenter the current working environment (as when doing a
  <quote>su</quote> to <systemitem class="username">root</systemitem> or
  another user).</para>

</sect1>