文件路径：

/etc/mysql/mysql.conf.d/mysqld.cnf

将bind-address = 127.0.0.1修改为bind-address = 0.0.0.0

重新启动并登陆mysql

sudo service mysql restart
2 mysql -uroot -p

修改权限：

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'yourpassword' WITH GRANT OPTION;

刷新生效

FLUSH PRIVILEGES;

重新启动mysql

sudo service mysql restart

注意：有时重启服务器后mysql未启动导致远程无法连接只需启动mysql

sudo service mysql start