Upstart 是一个用以替换 /sbin/init 守护进程的软件，基于事件机制开发。可用来处理启动过程中的任务和服务启动。
Upstart 1.6 ChangeLog:
'telinit u' now performs a stateful re-exec, allowing Upstart to continue to supervise jobs after an upgrade of either itself or any of its dependent libraries.
This release adds a dependency on libjson (JSON-C).
It adds initramfs-less boot support.
It allows tests to work in an sbuild environment.
Improved error handling.
Fixes a crash if 'kill signal' is specified as a particular numeric.
Documentation fixes
主页：http://upstart.ubuntu.com/
下载：http://upstart.ubuntu.com/download.html
来自:开源中国社区
