1. SQL服务端

  只需要一行命令：apt-get install mysql-server，安装过程中还需要设置root用户的密码

2. 更改root用户绑定的连接地址

1. 登陆MySQL数据库：mysql -u root -p，输入刚刚设置的密码后登陆进数据库

2. 更新权限：mysql> grant all privileges on *.* to 'root'@'%' identified by '*你的密码*' with grant option;

3. 刷新权限：mysql>flush privileges;

3. 更改配置文件允许远程ip地址连接

  MySQL最新版中和远程ip地址连接有关的配置文件已经改到了/etc/mysql/mysql.conf.d/mysqld.cnf
所以输入命令：sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf，找到这一段：

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address            = 127.0.0.1
#
# * Fine Tuning

注释掉这一行：bind-address = 127.0.0.1，如下：

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address           = 127.0.0.1
#
#* Fine Tuning

4. 最后，重启MySQL：sudo service mysql restart