upstart is a replacement for the /sbin/init daemon that handles starting of tasks and services during boot, stopping them during shutdown and supervising them while the system is running.
a gymnastic exercise performed starting from a position with the legs over the upper body and moving to an errect position by arching the back and swinging the legs out and down while forcing the chest upright
In Unix computing, Upstart is an event-based replacement for the init daemon written by Scott James Remnant, an employee of Canonical Ltd. Upstart operates asynchronously — as well as handling the starting of tasks and services during boot and stopping them during shutdown, it supervises them while the system is running.