The usual and most common way to shutdown your PLD Linux is to issue:

# shutdown -h now

or you can just enter:

# poweroff

Using just:

# halt

is about the same.

To reset your PLD machine you can hit Ctrl+Alt+Del or:

# reboot

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