THe MySQL APT Repository provides an easy and convenient way to get the latest MySQL software. My test server was need of a refresh so I put on a fresh install of Ubuntu 14.04 and downloaded
sudo dpkg -i mysql-apt-config_0.2.1-1ubuntu14.04_all.deb
[sudo] password for dstokes:
Selecting previously unselected package mysql-apt-config.
You will get a choice to install MySQL 5.6 or the latest 5.7 DMR.
sudo apt-get update Pulls the latest information from the repository for the various packages.
sudo apt-get install mysql-server Installs the server and will start it running. And then a quick
sudo apt-get install mysql-workbench to get me where i needed to be.
There is a detailed information at A Quick Guide to Using the MySQL APT Repository