全新的MySQL8.0正式发布后，第一时间尝鲜的在实用phpmyadmin的时候估计会碰到下面两种错误提示。
错误#2054
#2054 - The server requested authentication method unknown to the client
mysqli_real_connect(): The server requested authentication method unknown to the client [caching_sha2_password]
mysqli_real_connect(): (HY000/2054): The server requested authentication method unknown to the client
这个登陆时候就会碰到，因为新的MySQL 8.0.11默认使用的是caching_sha2_password身份验证方法。
解决办法
方法1：修改默认加密方式mysql_native_password
[mysqld]
default_authentication_plugin=mysql_native_password
方法2：修改登陆不上账号的加密方式
ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #修改加密规则
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'; #更新一下用户的密码
FLUSH PRIVILEGES; #刷新权限
错误 #1064
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server
version for the right syntax to use near 'REQUIRE NONE WITH MAX_QUERIES_PER_HOUR 0
MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_' at line 1
解决办法
既然phpmyadmin不能用就通过终端登陆执行命令添加
CREATE USER 'aaa'@'%' IDENTIFIED WITH mysql_native_password AS '***' REQUIRE NONE WITH #创建用户
MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0; GRANT USAGE ON *.* TO 'aaa'@'%' #授权