How to install latest MongoDB in ubuntu 12.04 12.10 13.04 13.10 14.04

1)
#sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB1

2)
#echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list

3)
#sudo apt-get update

4)
#sudo apt-get install mongodb-org


http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/