一、Ubuntu16.04.5 安裝 MySQL

1、使用apt命令安裝

sudo apt install mysql-server

安裝過程會提示，推薦設置MySQL的root用戶密碼（注意：這里root不是指ubuntu系統的root）

	While not mandatory, it is highly recommended that you set a password for the MySQL administrative "root" user.If this field is left blank, the password will not be changed.Net password for the MySQL "root" user:

2、安全設置

使用mysql_secure_installation配置mysql安全選項

$ sudo mysql_secure_installation Securing the MySQL server deployment.Enter password for user root: VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the