Most likely, you have been using a web browser or PDF viewer to read
the CLFS book so far. However, the temporary system in /tools does not have any of these, so you will need
to find a way to continue following the book after booting into the
temporary build environment. Possible solutions include:
Simply have the book open on another computer, or even read a printed copy, though one downside to this is that you cannot copy-and-paste commands.
Convert the CLFS book into plain text, thus allowing it to be viewed with more or view, by using a command such as the following:
lynx -dump /path/to/clfs/book.html > ${CLFS}/root/CLFS-book.txt
Cross-compile and install additional programs before booting, such as Lynx or Links to view the book, or Dropbear to allow remote login. See the CLFS Hints website at http://hints.clfs.org/index.php/ for more suggestions by other users.