To install Apache Maven 3.0.4 on Ubuntu 12.04, take the following steps:

• Get Maven 3.0.4 binary distribution using the following command:
  

  wget http://www.gtlib.gatech.edu/pub/apache/maven/binaries/apache-maven-3.0.4-bin.tar.gz 

• Unpack the binary distribution using the following command:  
  

      tar -zxf apache-maven-3.0.4-bin.tar.gz  

• Move uncompressed "apache-maven-3.0.4" directory to the /usr/local directory using this command: 
  

      sudo cp -R apache-maven-3.0.4 /usr/local  

• Create a symbolic link to /usr/bin using the following command:

      sudo ln -s /usr/local/apache-maven-3.0.4/bin/mvn /usr/bin/mvn  

• Verify for correct installation using the following comman:

      mvn –version  

  It should print the following information:

  Apache Maven 3.0.4 (r1232337; 2012-01-17 14:14:56+0530)
  Maven home: /usr/local/apache-maven-3.0.4
  Java version: 1.6.0_24, vendor: Sun Microsystems Inc.
  Java home: /usr/lib/jvm/jdk-6u32/jre
  Default locale: en_US, platform encoding: UTF-8
  OS name: "linux", version: "3.2.0-27-generic", arch: "amd64", family: "unix"