Binary package “powerwake” in ubuntu disco

remotely wake a napping system

 PowerWake is a generic mechanism for remotely waking systems. It is
 intended to support wake-on-lan, ipmi, and other remote waking mechanisms.
 Currently, wake-on-lan is the only supported mechanism. It also includes
 some handy caching of MAC addresses, such that systems can be awakened by
 hostname or ip address, in addition to MAC address.