一，问题描述：
MysqlERROR1698(28000)解决，新装了mysql-server-5.7,登录为这一问题，普通用户不能进mysql,只有root用户才能进，并且不需要任何密码。
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~$ mysql -u root -p
Enter password:
ERROR 1698 (28000): Access denied for user 'root'@'localhost'
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二，解决步骤：
停止mysql服务
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~$ sudo service mysql stop
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以安全模式启动MySQL
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~$ sudo mysqld_safe --skip-grant-tables &
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MySQL启动之后就可以不用密码登陆了
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~$ mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.10 MySQL Community Server (GPL)
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查看一下user表，错误的起因就是在这里， root的plugin被修改成了auth_socket，用密码登陆的plugin应该是mysql_native_password。
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mysql> select user, plugin from mysql.user;
+-----------+-----------------------+
| user | plugin |
+-----------+-----------------------+
| root | auth_socket |
| mysql.sys | mysql_native_password |
| dev | mysql_native_password |
+-----------+-----------------------+
<strong>3</strong> rows in set (<strong>0.01</strong> sec)
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关于auth_socket，在官方有说明： https://dev.mysql.com/doc/mysql-security-excerpt/5.5/en/socket-authentication-plugin.html ，反正现在暂时不用它， 那就把这里改了。
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mysql> update mysql.user set authentication_string=PASSWORD('newPwd'), plugin='mysql_native_password' where user='root';
Query OK, <strong>1</strong> row affected, <strong>1</strong> warning (<strong>0.00</strong> sec)
Rows matched: <strong>1</strong> Changed: <strong>1</strong> Warnings: <strong>1</strong>
mysql> flush privileges;
Query OK, <strong>0</strong> rows affected (<strong>0.00</strong> sec)
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重启服务，问题就解决了
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~$ sudo service mysql stop
...
* MySQL Community Server 5.7.10 is stopped
~$ sudo service mysql start
..
* MySQL Community Server 5.7.10 is started
~$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.10 MySQL Community Server (GPL)
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以上所述是小编给大家介绍的MySql Error 1698(28000)问题的解决方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！