1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
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3 | "http://www.oasis-open.org/docbook/xml/4.5/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-boot-settingenviron"> |
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9 | <?dbhtml filename="settingenvironment.html"?> |
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10 | |
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11 | <title>Setting Up the Environment</title> |
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12 | |
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13 | <para>The new instance of the shell that will start when the system is booted is a <emphasis>login</emphasis> |
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14 | shell, which will read the <filename>.bash_profile</filename> file. Create |
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15 | <filename>.bash_profile</filename> now:</para> |
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16 | |
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17 | <screen><userinput>cat > ${CLFS}/root/.bash_profile << "EOF" |
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18 | <literal>set +h |
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19 | PS1='\u:\w\$ ' |
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20 | LC_ALL=POSIX |
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21 | PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin:/tools/sbin |
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22 | export LC_ALL PATH PS1</literal> |
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23 | EOF</userinput></screen> |
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24 | |
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25 | <para>The <envar>LC_ALL</envar> variable controls the localization of |
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26 | certain programs, making their messages follow the conventions of a |
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27 | specified country. |
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28 | Setting <envar>LC_ALL</envar> to <quote>POSIX</quote> or <quote>C</quote> |
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29 | (the two are equivalent) ensures that everything will work as expected |
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30 | on your temporary system.</para> |
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31 | |
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32 | <para>By putting <filename class="directory">/tools/bin</filename> and |
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33 | <filename class="directory">/tools/sbin</filename> at |
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34 | the end of the standard <envar>PATH</envar>, all the programs installed in |
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35 | <xref linkend="chapter-temp-system"/> are only picked up by the shell |
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36 | if they have not yet been built on the target system. This configuration |
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37 | forces use of the final system binaries as they are built over the |
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38 | temp-system, minimising the chance of final system programs being built |
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39 | against the temp-system.</para> |
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40 | |
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41 | </sect1> |
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