sudo vim /etc/mysql/mysql.conf.d/cnf

忘记密码时：

1.输入skip-grant-tables

2.　 mysql> USE mysql ;
　　mysql> UPDATE user SET Password = password ( ‘new-password‘ ) WHERE User = ‘root‘ ;
　　mysql> flush privileges ;
　　mysql> quit

3.注释掉

　　bind-address           = 127.0.0.1

mysql设置远程连接