ubuntu install mysql and Foreign exposed port 3306

安装 sudo apt-get install mysql-client mysql-server

1. /etc/mysql/mysql.conf.d/mysqld.cnf VI
   the bind off 127 Note

2. mysql.user 授权
   update mysql.user set host = ‘%’ where username = ‘root’

3. Allow firewall ports
   sudo ufw allow 3306/tcp
   sudo ufw allow 3306
   sudo ufw allow 8080/tcp
   sudo ufw allow 8080
   sudo service ufw restart

4. Whether cloud hosting or docker External exposure

5. sudo service mysql restart
   sudo netstat -tap | grep mysql