On Ubuntu 14.04, how to upgrade MySQL to version 5.7?

On Ubuntu 14.04, to update MySQL to version 5.7, let's start by downloading the new packuet from the MySQL server:

wget http://dev.mysql.com/get/mysql-apt-config_0.6.0-1_all.deb

Install the packet with using dpkg :

sudo dpkg -i mysql-apt-config_0.6.0-1_all.deb

In the menus, select MySQL 5.7 and APPLY

When the previous comman is over, (it displays OK), update the packets:

sudo apt-get update

Now you can install the packet mysql-server which contain MySQL 5.7 :

sudo apt-get install mysql-server