[ 源代码： leave ]
软件包：leave（1.12-2.1 以及其他的）
Reminds you when you have to leave
Leave waits until the specified time, then reminds you that you have to leave. You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter. When you log off, leave exits just before it would have printed the next message.