lfs-book/chapter03/creatingdirs.xml

<sect1 id="ch04-creatingdirs">
<title>Creating directories</title>

<para>
Let's create the directory tree on the LFS partition based on the FHS
standard, which can be found at <ulink
url="http://www.pathname.com/fhs/">http://www.pathname.com/fhs/</ulink>.
Issuing the following commands will create a default directory layout:
</para>
 
<blockquote><literallayout>

	<userinput>cd $LFS</userinput>
	<userinput>mkdir -p bin boot dev/pts etc home lib mnt proc root sbin 
		tmp var</userinput>
	<userinput>for dirname in $LFS/usr $LFS/usr/local</userinput>
	<userinput><literal>&nbsp;&nbsp;&nbsp;do</literal></userinput>
	<userinput>&nbsp;&nbsp;&nbsp;mkdir $dirname</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;cd $dirname</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;mkdir bin etc include lib sbin share 
		src tmp var</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;ln -s share/man man</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;ln -s share/doc doc</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;ln -s share/info info</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;cd $dirname/share</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;mkdir dict doc info locale man nls misc 
		terminfo zoneinfo</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;cd $dirname/share/man</userinput>
	<userinput>&nbsp;&nbsp;&nbsp;mkdir man1 man2 man3 man4 man5 man6 man7 
		man8</userinput>
	<userinput>done</userinput>
	<userinput>cd $LFS/var</userinput>
	<userinput>mkdir lock log mail run spool tmp</userinput>

</literallayout></blockquote>

<para>
Normally, directories are created with permission mode 755, which isn't
desired for all directories. The first change is a mode 0750 for the 
$LFS/root directory. This is to make sure that not just everybody can 
enter the /root directory (the same a user would do with /home/username 
directories). The second change is a mode 1777 for the tmp 
directories. This way, any user can write data to the /tmp directory but 
cannot remove another user's files (the latter is caused by
the so-called "sticky bit" - bit 1 of the 1777 bit mask).
</para>

<blockquote><literallayout>

	<userinput>cd $LFS &amp;&amp;</userinput>
	<userinput>chmod 0750 root &amp;&amp;</userinput>
	<userinput>chmod 1777 tmp usr/tmp usr/local/tmp var/tmp</userinput>

</literallayout></blockquote>

<para>
Now that the directories are created, copy the source files that were
downloaded in chapter 3 to some subdirectory under $LFS/usr/src (you
will need to create the desired directory yourself).
</para>

</sect1>