| 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-final-system-creatingdirs">
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| 9 | <?dbhtml filename="creatingdirs.html"?>
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| 10 |
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| 11 | <title>Creating Directories</title>
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| 12 |
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| 13 | <para>It is time to create some structure in the target CLFS file system.
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| 14 | Create a standard directory tree by issuing the following commands:</para>
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| 15 |
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| 16 | <screen><userinput>mkdir -pv ${CLFS}/targetfs/{bin,boot,dev,etc,home,lib/{firmware,modules}}
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| 17 | mkdir -pv ${CLFS}/targetfs/{mnt,opt,proc,sbin,srv,sys}
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| 18 | mkdir -pv ${CLFS}/targetfs/var/{cache,lib,local,lock,log,opt,run,spool}
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| 19 | install -dv -m 0750 ${CLFS}/targetfs/root
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| 20 | install -dv -m 1777 ${CLFS}/targetfs/tmp
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| 21 | mkdir -pv ${CLFS}/targetfs/usr/{,local/}{bin,include,lib,sbin,share,src}</userinput></screen>
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| 22 |
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| 23 | <para>Directories are, by default, created with permission mode 755, but
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| 24 | this is not desirable for all directories. In the commands above, two
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| 25 | changes are made—one to the home directory of user <systemitem
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| 26 | class="username">root</systemitem>, and another to the directories for
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| 27 | temporary files.</para>
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| 28 |
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| 29 | <para>The first mode change ensures that not just anybody can enter
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| 30 | the <filename class="directory">/root</filename> directory—the
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| 31 | same as a normal user would do with his or her home directory. The
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| 32 | second mode change makes sure that any user can write to the
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| 33 | <filename class="directory">/tmp</filename> and <filename
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| 34 | class="directory">/var/tmp</filename> directories, but cannot remove
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| 35 | another user's files from them. The latter is prohibited by the so-called
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| 36 | <quote>sticky bit,</quote> the highest bit (1) in the 1777 bit mask.</para>
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| 37 |
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| 38 | <sect2>
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| 39 | <title>FHS Compliance Note</title>
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| 40 |
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| 41 | <para>The directory tree is based on the Filesystem Hierarchy Standard (FHS)
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| 42 | (available at <ulink url="http://www.pathname.com/fhs/"/>).</para>
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| 43 |
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| 44 | </sect2>
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| 45 |
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| 46 | </sect1>
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