CentOS 7.4 install MySQL

# https://www.linode.com/docs/databases/mysql/how-to-install-mysql-on-centos-7/
```bash
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
yum update
sudo yum install mysql-server -y
```