"Ordinarily, the only place you see these programs are in
laptops and the methods should work on laptops, and there are many
places to go for information on the specialized laptop tweaks and
GNOME and KDE laptop configuration options.
"But in an age of global warming and increasing costs per KWh,
saving power on workstations by putting them to sleep when not in
active use is a good idea, too. Unfortunately, this is not a part
of the default Linux installation, at least not in Debian. Worse,
the available methods for putting a Linux computer to sleep are
considered experimental, so if you can't get anything you see here
to work reliably and stably, don't trust your data to it..."