How to Check Gmail and Hotmail Services Status?

I could not login to my Hotmail today. Is Hotmail down?
To check for Hotmail or other Microsoft Windows Live services status, use this link: https://status.live.com/

To check Gmail or other Google App service status:
http://www.google.com/appsstatus

How to restore the Package Explorer in Eclipse?

Click on Windows -> View -> Package Explorer to restore the Package Explorer view on Eclipse IDE.

Reinstall Guest Additions on Ubuntu Virtual Machine

Each time Ubuntu virtual machine running on Apple Mac OS/X host machine upgraded to new kernel or major upgrade, Oracle VM VirtualBox Guest Additions need to re-install. Also, it need to upgrade when Oracle VM VirtualBox upgrade to new version.