The usual and most common way to shutdown your PLD Linux is to issue:
# shutdown -h now
or you can just enter:
is about the same.
To reset your PLD machine you can hit Ctrl+Alt+Del or:
During your work with PLD you can freely switch from one runlevel to another. To do that just issue:
# init <runlevel>
where <runlevel> is a runlevel number (1-5).
To go into single-user mode you would enter:
# init 1