MySQL istallation problem on Ubuntu 16.04 (my.cnf public ip problem)

I follow these instructions to install mysql in Ubuntu 14.04 and it works great. But I make a clean installation of Ubuntu 16.04 and make the same steps to install MySQL and I have problems.

The my.cnf file is clean. I replace the content for my.cnf file from theubuntu 14.04 installation, restart the service and it doesn't work.

At this point I can't allow access to MySQL on a public IP by modifying the bind-address parameter in /etc/my.cnf.

The configuration file name and directory change in Ubuntu 16.04 The new file and location here:

/etc/mysql/mysql.conf.d/mysqld.cnf

You can edit this using:

sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf

OR

sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf

I find this solution here:

http://www.cyberciti.biz/faq/howto-install-mysql-on-ubuntu-linux-16-04/

The configuration file name and directory changed in Ubuntu 16.04 when compared to Ubuntu 14.04. The new file is located here:

/etc/mysql/mysql.conf.d/mysql.cnf

You can edit it using:

sudo nano /etc/mysql/mysql.conf.d/mysql.cnf