source: chapter06/creatingdirs.xml@ dd2d8eb

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Last change on this file since dd2d8eb was dd2d8eb, checked in by Bruce Dubbs <bdubbs@…>, 3 years ago

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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11578 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-creatingdirs">
9 <?dbhtml filename="creatingdirs.html"?>
10
11 <title>Creating Directories</title>
12
13 <para>It is time to create some structure in the LFS file system. Create a
14 standard directory tree by issuing the following commands:</para>
15
16<screen><userinput>mkdir -pv /{bin,boot,etc/{opt,sysconfig},home,lib/firmware,mnt,opt}
17mkdir -pv /{media/{floppy,cdrom},sbin,srv,var}
18install -dv -m 0750 /root
19install -dv -m 1777 /tmp /var/tmp
20mkdir -pv /usr/{,local/}{bin,include,lib,sbin,src}
21mkdir -pv /usr/{,local/}share/{color,dict,doc,info,locale,man}
22mkdir -v /usr/{,local/}share/{misc,terminfo,zoneinfo}
23mkdir -v /usr/libexec
24mkdir -pv /usr/{,local/}share/man/man{1..8}
25mkdir -v /usr/lib/pkgconfig
26
27case $(uname -m) in
28 x86_64) mkdir -v /lib64 ;;
29esac
30
31mkdir -v /var/{log,mail,spool}
32ln -sv /run /var/run
33ln -sv /run/lock /var/lock
34mkdir -pv /var/{opt,cache,lib/{color,misc,locate},local}</userinput></screen>
35
36 <para>Directories are, by default, created with permission mode 755, but
37 this is not desirable for all directories. In the commands above, two
38 changes are made&mdash;one to the home directory of user <systemitem
39 class="username">root</systemitem>, and another to the directories for
40 temporary files.</para>
41
42 <para>The first mode change ensures that not just anybody can enter
43 the <filename class="directory">/root</filename> directory&mdash;the
44 same as a normal user would do with his or her home directory. The
45 second mode change makes sure that any user can write to the
46 <filename class="directory">/tmp</filename> and <filename
47 class="directory">/var/tmp</filename> directories, but cannot remove
48 another user's files from them. The latter is prohibited by the so-called
49 <quote>sticky bit,</quote> the highest bit (1) in the 1777 bit mask.</para>
50
51 <sect2>
52 <title>FHS Compliance Note</title>
53
54 <para>The directory tree is based on the Filesystem Hierarchy Standard
55 (FHS) (available at <ulink
56 url="https://wiki.linuxfoundation.org/en/FHS"/>). The FHS also specifies
57 the optional existence of some directories such as <filename
58 class="directory">/usr/local/games</filename> and <filename
59 class="directory">/usr/share/games</filename>. We create only the
60 directories that are needed. However, feel free to create these
61 directories. </para>
62
63 </sect2>
64
65</sect1>
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