为什么配置skip-name-resolve？
由于mysql -h${ip} 远程访问速度过慢，
mysql -h172.16.66.171 -uroot -p123456
根据网友经验（https://www.cnblogs.com/yjf512/p/3803762.html），
vi /etc/my.cnf [mysqld]
skip-name-resolve
重启mysql,发现远程访问msyql速度上来了，解决问题。
然而引发了新的问题：
但是却发现msyql（mysql -h127.0.0.1 -uroot -p123456）无法本地访问：
[root@localhost ~]# mysql -h127.0.0. -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
ERROR (): Access denied for user 'root'@'127.0.0.1' (using password: YES)
而不输入密码（mysql -h127.0.0.1 -uroot）却可以访问。
[root@localhost ~]# mysql -h127.0.0. -uroot
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.6.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
解决方法：
参考（http://blog.sina.com.cn/s/blog_759a5a7c01017dj0.html），重置root密码：
[root@localhost ~]# mysql -h127.0.0.1 -uroot
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.6.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> use mysql;
Database changed
mysql> update user set password=password("123456") where user="root";
Query OK, rows affected (0.06 sec)
Rows matched: Changed: Warnings: mysql> flush privileges;
Query OK, rows affected (0.13 sec) mysql> quit
Bye [root@localhost ~]#
用 mysql -h127.0.0.1 -uroot -p123456 访问，问题解决。
[root@localhost ~]# mysql -h127.0.0. -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.6.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
由于开启skip-name-resolve引发的ERROR 1045 (28000)网上资料不详，解决这个问题花了大半天，所以发布这篇文章。
备注: 添加了禁用解析 skip-name-resolve, 127.0.0.1登录和连接出错,我的个人理解是因为 数据库用户表设置问题
由用户表可以看出,及时你用127.0.0.1 连接,还是要解析,如果不解析就连接不上了,因为mysql服务器只知道主机名localhost
你需要在加一个用户,主机名为127.0.0.1的才行.(没有试验,之后有机会再实验)
转: https://www.cnblogs.com/hongsm/p/7978624.html