How to install Maven 3 on Ubuntu 12.04/12.10/13.04 by using apt-get

sudo apt-get remove maven2

The whole process I came up with is as follows:

1. sudo -H gedit /etc/apt/sources.list

2. Add the following line the sources.list file:

   deb http://ppa.launchpad.net/natecarlson/maven3/ubuntu precise main

   deb-src http://ppa.launchpad.net/natecarlson/maven3/ubuntu precise main

3. sudo apt-get update && sudo apt-get install maven3

4. sudo ln -s /usr/share/maven3/bin/mvn /usr/bin/mvn

见：http://stackoverflow.com/questions/15630055/how-to-install-maven-3-on-ubuntu-12-04-12-10-13-04-by-using-apt-get