Now that all the packages which are required to build the rest of the
needed tools are on the system, it is time to enter the chroot
environment to finish installing the remaining temporary tools. This
environment will be in use also for installing the final system. As
user root
, run the following command
to enter the environment that is, at the moment, populated with only
the temporary tools:
chroot "$LFS" /usr/bin/env -i \ HOME=/root \ TERM="$TERM" \ PS1='(lfs chroot) \u:\w\$ ' \ PATH=/usr/bin:/usr/sbin \ /bin/bash --login +h
The -i
option given to the
env command will clear
all variables of the chroot environment. After that, only the
HOME
, TERM
,
PS1
, and PATH
variables are set again. The TERM=$TERM
construct will set the
TERM
variable inside chroot to the same
value as outside chroot. This variable is needed for programs like
vim and less to operate properly. If other
variables are desired, such as CFLAGS
or
CXXFLAGS
, this is a good place to set them
again.
From this point on, there is no need to use the LFS
variable anymore because all work will be
restricted to the LFS file system. This is because the Bash shell is
told that $LFS
is now the root
(/
) directory.
Notice that /tools/bin
is not in the
PATH
. This means that the cross toolchain
will no longer be used in the chroot environment. This occurs when
the shell does not “remember” the locations of executed
binaries—for this reason, hashing is switched off by passing
the +h
option to bash.
Note that the bash
prompt will say I have no name!
This is normal because the /etc/passwd
file has not been created yet.
It is important that all the commands throughout the remainder of this chapter and the following chapters are run from within the chroot environment. If you leave this environment for any reason (rebooting for example), ensure that the virtual kernel filesystems are mounted as explained in Section 7.3.2, “Mounting and Populating /dev” and Section 7.3.3, “Mounting Virtual Kernel File Systems” and enter chroot again before continuing with the installation.