Install Eclipse with Android Development Tools (ADT) plugin in Ubuntu

1. Install Eclipse main program

$ sudo apt-get install eclipse

2. Setup plugin source of Eclipse
Note: Ubuntu default Eclipse installation with no source in [Menu->Help->Install New Software]
(1) Add Eclipse source:

Name: Eclipse - galileo
Location: http://download.eclipse.org/releases/galileo

(2) Add Android source:

Name: Android Development Tools (ADT)
Location: https://dl-ssl.google.com/android/eclipse/

3. Install ADT
...

Ref:
(1) 3. Install the ADT Plugin for Eclipse
http://developer.android.com/sdk/index.html
(2) requires 'org.eclipse.gef 0.0.0' but it could not be found
https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/482244