mirror of https://github.com/tLDP/LDP
57 lines
2.6 KiB
XML
57 lines
2.6 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-partitioning-aboutlfs">
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<?dbhtml filename="aboutlfs.html"?>
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<title>Setting The $LFS Variable</title>
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<para>Throughout this book, the environment variable <envar>LFS</envar> will
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be used several times. You should ensure that this variable is always defined
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throughout the LFS build process. It should be set to the name of the
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directory where you will be building your LFS system - we will use
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<filename class="directory">/mnt/lfs</filename> as an example, but the
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directory choice is up to you. If you are building LFS on a separate
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partition, this directory will be the mount point for the partition.
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Choose a directory location and set the variable with the
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following command:</para>
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<screen role="nodump"><userinput>export LFS=<replaceable>/mnt/lfs</replaceable></userinput></screen>
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<para>Having this variable set is beneficial in that commands such as
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<command>mkdir -v $LFS/tools</command> can be typed literally. The shell
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will automatically replace <quote>$LFS</quote> with
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<quote>/mnt/lfs</quote> (or whatever the variable was set to) when it
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processes the command line.</para>
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<caution>
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<para>Do not forget to check that <envar>LFS</envar> is set whenever
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you leave and reenter the current working environment (such as when doing a
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<command>su</command> to <systemitem class="username">root</systemitem> or
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another user). Check that the <envar>LFS</envar> variable is set up
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properly with:</para>
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</caution>
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<screen role="nodump"><userinput>echo $LFS</userinput></screen>
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<para>Make sure the output shows the path to your LFS system's build
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location, which is <filename class="directory">/mnt/lfs</filename> if the
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provided example was followed. If the output is incorrect, use the command
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given earlier on this page to set <envar>$LFS</envar> to the correct
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directory name.</para>
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<note><para>One way to ensure that the <envar>LFS</envar> variable is always
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set is to edit the <filename>.bash_profile</filename> file in both your
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personal home directory and in <filename>/root/.bash_profile</filename> and
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enter the export command above. In addition, the shell specified in the
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<filename>/etc/passwd</filename> file for all users that need the
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<envar>LFS</envar> variable needs to be bash to ensure that the
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<filename>/root/.bash_profile</filename> file is incorporated as a part of
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the login process.</para></note>
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</sect1>
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