aptitude install mysql-server mysql-client libmysqlclient-dev
vim /etc/mysql/my.cnf
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
service mysql restart
mysql -uroot -p
GRANT ALL PRIVILEGES ON `%\_staging` . * TO 'staging'@'localhost' IDENTIFIED BY '***';
GRANT ALL PRIVILEGES ON `%\_production` . * TO 'production'@'localhost' IDENTIFIED BY '***';