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.