dtpower

The Power Management graphical user interface, a program called dtpower, allows you to designate periods of inactivity after which the system will shut down. You can also use this tool to set the time of day to activate the automatic shutdown; for example, if you wish to use this AutoShutdown feature only after your regular work hours.

On sun4u-architecture workstations, you can also use an AutoWakeup feature of dtpower to power on the system at a specific time of day following an AutoShutdown.