Fix typo/omission in creation of /etc/modprobe.d directory

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9171 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter08/kernel.xml

@@ -197,7 +197,7 @@ cp -r Documentation/* /usr/share/doc/linux-&linux-version;</userinput></screen>
     <para>Create a new file <filename>/etc/modprobe.d/usb.conf</filename> by running
     the following:</para>
 
-<screen><userinput>install -v -m755 /etc/modprobe.d
+<screen><userinput>install -v -m755 -d /etc/modprobe.d
 cat &gt; /etc/modprobe.d/usb.conf &lt;&lt; "EOF"
 <literal># Begin /etc/modprobe.d/usb.conf