MySQL 8.0+ 的用户 'root'@'localhost' 访问被拒绝（使用密码：否）

Question

Initially mysql -u root was working fine.最初mysql -u root工作正常。

Then I tried to reset root user password using below command然后我尝试使用以下命令重置root用户密码

UPDATE set authentication_string=PASSWORD("password") where User='root';

But when I tried mysql -u root -ppassword it's throwing但是当我尝试mysql -u root -ppassword它抛出

access denied for user 'root'@'localhost' (using password: NO)

Answer 1

So to fix above solution do following steps:因此，要修复上述解决方案，请执行以下步骤：

First search where your mysql scripts exist in your system using which mysql首先搜索 mysql 脚本在您的系统中存在的位置，使用which mysql

/usr/local/bin/mysql /usr/local/bin/mysql

run cd /usr/local/bin运行cd /usr/local/bin
Then look for mysql.server file and execute mysql.server stop然后查找mysql.server文件并执行mysql.server stop

output is: output 是：
Shutting down MySQL关机 MySQL
. . SUCCESS!成功！

run killall mysqld mysqld_safe运行killall mysqld mysqld_safe
run mysqld_safe --skip-grant-tables &运行mysqld_safe --skip-grant-tables &
Then try mysql -u root it will work然后尝试mysql -u root它会工作

So next step is to update the root password back to <no-password>所以下一步是将root密码更新回<no-password>

run use mysql;运行use mysql;
run Update user set authentication_string='' where User='root';运行Update user set authentication_string='' where User='root';

NOTE: To update mysql 8.0+ password, always use注意：要更新 mysql 8.0+ 密码，请始终使用

ALTER USER 'root'@'localhost' IDENTIFIED BY 'newpassword';