When the kernel boots the system, it requires the presence of a few
device nodes, in particular the console and null
devices. The device nodes will be created on the hard disk so that
they are available before udev has been started, and
additionally when Linux is started in single user mode (hence the
restrictive permissions on console).
Create these by running the following commands:
mknod -m 0600 ${CLFS}/dev/console c 5 1
mknod -m 0666 ${CLFS}/dev/null c 1 3