2011-03-03 10:43:32 
阿炯
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 is an event-based replacement for the /sbin/init daemon which handles starting of tasks and services during boot, stopping them during shutdown and supervising them while the system is running.
Feature
* Tasks and Services are started and stopped by events
* Events are generated as tasks and services are started and stopped
* Events may be received from any other process on the system
* Services may be respawned if they die unexpectedly
* Supervision and respawning of daemons which separate from their parent process
* Communication with the init daemon over D-Bus
最新版本：1.8
该版本现在可监控文件和目录，如果指定的文件或者目录创建、修改或者删除，Upstart 会启动一个相关的作业，举个例子：这意味着服务可在配置文件更改后自动重启。
官方主页：http://upstart.ubuntu.com/