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 -h127.0.0.1 -uroot -p123456

Warning: Using a password on the command lineinterfacecan be insecure.

ERROR1045 (28000): 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 -h127.0.0.1 -uroot

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection idis 91114Server version:5.6.35-log MySQL Community Server (GPL)

Copyright (c)2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracleis 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 idis 91114Server version:5.6.35-log MySQL Community Server (GPL)

Copyright (c)2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracleis 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,3 rows affected (0.06sec)

Rows matched:5 Changed: 3 Warnings: 0mysql>flush privileges;

Query OK,0 rows affected (0.13sec)

mysql>quit

Bye

[root@localhost ~]#

用 mysql -h127.0.0.1 -uroot -p123456 访问，问题解决。

[root@localhost ~]# mysql -h127.0.0.1 -uroot -p123456

Warning: Using a password on the command lineinterfacecan be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection idis 2487Server version:5.6.35-log MySQL Community Server (GPL)

Copyright (c)2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracleis 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。

My first blog on cnblogs!