当您的密码丢失时就会发生这种情况。

忘记密码时的修改步骤:

Stop MySQL Server (on Linux): sudo systemctl stop mysql Start the database without loading the grant tables or enabling networking: sudo mysqld_safe --skip-grant-tables --skip-networking & The ampersand at the end of this command will make this process run in the background, so you can continue to use your terminal and run mysql -u root (as root). It will not ask for a password. If you get error like as below: 2018-02-12T08:57:39.826071Z mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists. mysql -u root ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) [1]+ Exit 1 Make MySQL service directory. sudo mkdir /var/run/mysqld Give MySQL user permission to write to the service directory. sudo chown mysql: /var/run/mysqld Run the same command in step 2 to run MySQL in background. Run mysql -u root. You will get the MySQL console without entering a password. Run these commands FLUSH PRIVILEGES; For MySQL 5.7.6 and newer ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password'; For MySQL 5.7.5 and older SET PASSWORD FOR 'root'@'localhost' = PASSWORD('new_password'); If the ALTER USER command doesn't work use: UPDATE mysql.user SET authentication_string = PASSWORD('new_password') WHERE User = 'root' AND Host = 'localhost'; Now exit To stop the instance started manually: sudo kill `cat /var/run/mysqld/mysqld.pid` Restart MySQL sudo systemctl start mysql

我所面临的错误是:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

这是一个端口运行的问题。

默认情况下，MySQL运行在3306端口上。

你可以通过运行来检查

在32位系统中: sudo / opt / lampp / manager-linux.run 在64位系统中: sudo / opt / lampp / manager-linux-x64.run

然后点击Configure按钮。

在我的示例中，端口运行在3307上，我使用了该命令

mysql -u root -p -P 3307 -h 127.0.0.1

我也遇到了同样的问题。我做了:

打开cmd 进入C:\Program Files\MySQL\MySQL Server 8.0\bin> (MySQL Server 8.0可能不同，取决于你安装的服务器) 然后输入以下命令mysql -u root -p 它会提示输入密码…简单地按Enter，因为有时你在安装时输入的密码会变为空白。

现在您可以简单地访问数据库。

这个解决方案在Windows平台上很适合我。

在服务器初始启动时，假设服务器的数据目录为空，会发生以下情况:

完成服务器的初始化。 在data目录下生成SSL证书和密钥文件。 安装并启用validate_password插件。 创建超级用户帐户“root”@“localhost”。超级用户的密码被设置并存储在错误日志文件中。

要显示它，使用以下命令:

shell> sudo grep 'temporary password' /var/log/mysqld.log

请使用临时密码登录，并自定义超级用户密码，尽快修改root用户密码:

shell> mysql -u root -p

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass5!'; 

我最近也遇到了同样的问题，但就我而言，我记得我的密码很好，但它一直给我同样的错误。我尝试了很多方法，但是没有一个有用。然后我试了一下:

mysql -u root -p

然后它会要求你输入密码，就像这样

Enter password:

然后我输入了我用的密码。这是所有。

如果其他答案都不适合您，并且您收到了以下错误:

mysqld_safe Logging to '/var/log/mysql/error.log'.
mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.
[1]+  Exit 1                  sudo mysqld_safe --skip-grant-tables

按照以下命令依次执行，直到重置密码:

# Stop your server first
sudo service mysql stop

# Make the MySQL service directory.
sudo mkdir /var/run/mysqld

# Give MySQL permission to work with the created directory
sudo chown mysql: /var/run/mysqld

# Start MySQL, without permission and network checking
sudo mysqld_safe --skip-grant-tables --skip-networking &

# Log in to your server without any password.
mysql -u root mysql


# Update the password for the root user:
UPDATE mysql.user SET authentication_string=PASSWORD('YourNewPasswordBuddy'), plugin='mysql_native_password' WHERE User='root' AND Host='localhost';

# If you omit (AND Host='localhost') section, it updates
# the root password regardless of its host

FLUSH PRIVILEGES;
EXIT;

# Kill the mysqld_safe process
sudo service mysql restart

# Now you can use your new password to log in to your server
mysql -u root -p

# Take note for remote access. You should create a remote
# user and then grant all privileges to that remote user