1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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4 | %general-entities;
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5 | ]>
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6 | <sect1 id="ch-system-creatingdirs">
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7 | <title>Creating directories</title>
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8 | <?dbhtml filename="creatingdirs.html"?>
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9 |
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10 | <para>Let's now create some structure in our LFS file system. Let's create
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11 | a directory tree. Issuing the following commands will create a more or less
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12 | standard tree:</para>
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13 |
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14 | <screen><userinput>mkdir -p /{bin,boot,dev/{pts,shm},etc/opt,home,lib,mnt,proc}
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15 | mkdir -p /{root,sbin,srv,tmp,usr/local,var,opt}
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16 | mkdir -p /media/{floppy,cdrom}
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17 | mkdir /usr/{bin,include,lib,sbin,share,src}
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18 | ln -s share/{man,doc,info} /usr
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19 | mkdir /usr/share/{doc,info,locale,man}
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20 | mkdir /usr/share/{misc,terminfo,zoneinfo}
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21 | mkdir /usr/share/man/man{1,2,3,4,5,6,7,8}
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22 | mkdir /usr/local/{bin,etc,include,lib,sbin,share,src}
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23 | ln -s share/{man,doc,info} /usr/local
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24 | mkdir /usr/local/share/{doc,info,locale,man}
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25 | mkdir /usr/local/share/{misc,terminfo,zoneinfo}
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26 | mkdir /usr/local/share/man/man{1,2,3,4,5,6,7,8}
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27 | mkdir /var/{lock,log,mail,run,spool}
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28 | mkdir -p /var/{tmp,opt,cache,lib/misc,local}
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29 | mkdir /opt/{bin,doc,include,info}
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30 | mkdir -p /opt/{lib,man/man{1,2,3,4,5,6,7,8}}</userinput></screen>
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31 |
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32 | <para>Directories are, by default, created with permission mode 755, but this
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33 | isn't desirable for all directories. We will make two changes: one to the home
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34 | directory of <emphasis>root</emphasis>, and another to the directories for
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35 | temporary files.</para>
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36 |
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37 | <screen><userinput>chmod 0750 /root
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38 | chmod 1777 /tmp /var/tmp</userinput></screen>
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39 |
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40 | <para>The first mode change ensures that not just anybody can enter the
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41 | <filename class="directory">/root</filename> directory -- the same
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42 | as a normal user would do with his or her home directory.
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43 | The second mode change makes sure that any user can write to the
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44 | <filename class="directory">/tmp</filename> and
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45 | <filename class="directory">/var/tmp</filename> directories, but
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46 | cannot remove other users' files from them. The latter is prohibited
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47 | by the so-called <quote>sticky bit</quote> -- the highest bit in the 1777 bit
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48 | mask.</para>
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49 |
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50 | <sect2>
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51 | <title>FHS compliance note</title>
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52 |
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53 | <para>We have based our directory tree on the FHS standard (available at
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54 | <ulink url="http://www.pathname.com/fhs/"/>). Besides the above created
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55 | tree this standard stipulates the existence of
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56 | <filename class="directory">/usr/local/games</filename> and
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57 | <filename class="directory">/usr/share/games</filename>, but we don't
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58 | much like these for a base system. However, feel free to make your system
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59 | FHS-compliant. As to the structure of the
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60 | <filename class="directory">/usr/local/share</filename> subdirectory, the FHS
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61 | isn't precise, so we created here the directories that we think are needed.</para>
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62 |
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63 | </sect2>
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64 |
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65 | </sect1>
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