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.

唯一对我有效的方法是这里描述的(我运行的是ubuntu 14.04)。为了清晰起见，以下是我遵循的步骤:

sudo vim /etc/mysql/my.cnf Add the following lines at the end: [mysqld] skip-grant-tables sudo service mysql restart mysql -u root use mysql select * from mysql.user where user = 'root'; - Look at the top to determine whether the password column is called password or authentication_string UPDATE mysql.user set *password_field from above* = PASSWORD('your_new_password') where user = 'root' and host = 'localhost'; - Use the proper password column from above FLUSH PRIVILEGES; exit sudo vim /etc/mysql/my.cnf Remove the lines added in step 2 if you want to keep your security standards. sudo service mysql restart

参考:https://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html

该解决方案属于以前版本的MySQL。 通过使用套接字身份验证登录MySQL，您可以做到这一点。

sudo mysql -u root

然后可以运行以下命令。

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

详情请点击这里。

我还没有看到MySQL 8.0指南中推荐的官方步骤，这是唯一适合我的步骤。下面是这些步骤的总结。

Stop the MySQL server if it is running. Look in /var/lib/mysql/, /var/run/mysqld/, or /usr/local/mysql/data/ to find the pid file with the server's process ID. Generally the file begins with either mysqld or your system's host name and ends with .pid. Replace mysql-data-directory and host_name that you just found, in the following command: $ sudo kill `sudo cat /mysql-data-directory/host_name.pid` This command will create a text file in /tmp/mysql-init with the SQL statement and makes the mysql user the owner. Replace in the command MyNewPass with your own password. $ echo "ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';" > /tmp/mysql-init && sudo chown mysql /tmp/mysql-init Start the MySQL server by running the following command on the command line. After this the password is updated and you can close the server again with CTRL+C. $ sudo mysqld --user=mysql --init-file=/tmp/mysql-init & Remove the temporary file with your password: $ sudo rm /tmp/mysql-init

如果部署在xampp上，您可以通过提供的phpadmin gui轻松更改mysql密码。

phpMyAdmin -> User Accounts -> Edit Privileges (Select the intended user) -> Change Password (Tab)

对于mysql 5.6，这个命令有效，你可以通过向导设置密码:

sudo dpkg-reconfigure mysql-server-5.6