1.打开nano / vim，创建一个包含以下内容的文件，并将文件保存为~/mysql-pwd

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

停止mysql sudo systemctl停止mysql 执行sudo mysqld -init-file=~/mysql-pwd命令 重启mysql sudo systemctl start mysql 现在登录mysql -u root -p。password将是你的NEWPASSWORD

Instead of resetting the password there is a work around on the local machine if you have setup phpmyadmin to connect without giving the password or username. Check this out by starting mysql, apache etc. I have xampp installed in my local machine. So starting the xampp will start all the necessary services. Now going to http://localhost/phpmyadmin shows me all the databases. This confirms that you have saved the username and passsword in the config file of phpmyadmin which can be found in the phpmyadmin install location. If you have xampp installed the phpmyadmin folder can be found in the root folder of xampp installation. Search for the word password in the config.inc.php file. There you will find the password and username.

当你在你想要更改密码的系统上使用MySQL的PASSWORD()时，它可能会导致密码在MySQL日志中以cleartext [source]显示。对我来说，让它们和备份等像密码一样安全听起来像是噩梦，所以我喜欢这样做:

On your local machine, run this with your password: mysql -u someuser -p < <(echo "SELECT PASSWORD('mypass');") Note the space in front to prevent it from turning up in the bash history (for other distros than Ubuntu, this might work differently – source). On your server machine, execute the following command to change its MySQL root password (replace myhash with your password's hash as printed by the first command): mysql -u root -p < <(echo "SET PASSWORD FOR root@localhost = 'myhash';") Optionally, let's be a bit paranoid: On your local machine, clear your terminal screen with clear and purge your virtual terminal scrollback, to hide the cleartext password appearing in the command above.

设置MySQL密码

停止MySQL数据库服务

sudo /etc/init.d/mysql stop

创建一个新的mysqld目录

Sudo mkdir /var/run/mysqld/

给予mysql用户访问权限

Sudo chown mysql /var/run/mysqld/

以安全模式启动MySQL…

Sudo mysqld_safe—skip-grant-tables &

无需密码登录数据库服务器

Sudo mysql -u root

使用默认的mysql数据库

使用mysql;

修改root密码

update user set authentication_string=PASSWORD(" new_passwor_here ") where user ='root';

保存更改 冲洗特权; 退出; 停止MySQL安全模式，启动MySQL默认服务

sudo /etc/init.d/mysql stop

sudo /etc/init.d/mysql start

使用root新密码重新登录MySQL数据库

-u root -p

***来源:https://websiteforstudents.com/resetting-mysql-root-password-on-ubuntu-16-04-17-10-and-18-04-lts/

修改MySQL root密码。

此方法将密码暴露到命令行历史记录中，这些命令应该以root身份运行。

通过mysql命令行工具登录: Mysql -uroot -poldpassword 执行如下命令: SET PASSWORD FOR root@ localhost = PASSWORD('newpassword');

or

运行此命令，为当前用户设置密码(在本例中为'root'): SET PASSWORD = PASSWORD('newpassword');

这就是我的解决方案。我在Ubuntu 18.04工作: https://stackoverflow.com/a/46076838/2400373

但是重要的是最后一步的改变:

UPDATE mysql.user SET authentication_string=PASSWORD('YOURNEWPASSWORD'), plugin='mysql_native_password' WHERE User='root' AND Host='localhost';