In this chapter, we will perform a few additional tasks to prepare
for building the temporary system. We will create a set of directories in
$LFS (in which we will install the
temporary tools), add an unprivileged user,
and create an appropriate build environment for that user. We will also
explain the units of time (“SBUs”) we use to measure how
long it takes to build LFS packages, and provide some information about package
test suites.