mysql服务器安装后的默认密码是:mysql

除非包管理器要求您在安装期间输入根密码，否则默认的根密码是空字符串。要连接到新安装的服务器，输入:

shell> mysql -u root --password=
mysql>

要更改密码，请返回unix shell并输入:

shell> mysqladmin -u root --password= password root

新密码为“root”。现在连接到服务器:

shell> mysql -u root --password=
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

哎呀，密码改了。使用新的根:

shell> mysql -u root --password=root
...
blah, blah, blah : mysql welcome banner
...
mysql> 

宾果!做一些有趣的事情

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

莫里斯

多亏了@thusharaK，我可以在不知道旧密码的情况下重置根密码。

在ubuntu上，我做了以下操作:

sudo service mysql stop
sudo mysqld_safe --skip-grant-tables --skip-syslog --skip-networking

然后在新的终端运行mysql:

mysql -u root

并执行如下命令修改密码:

UPDATE mysql.user SET authentication_string=PASSWORD('password') WHERE User='root';
FLUSH PRIVILEGES;

在MySQL 5.7中，MySQL中的password字段。用户表字段被删除，现在字段名是'authentication_string'。

退出mysql安全模式，启动mysql服务:

mysqladmin shutdown
sudo service mysql start

这里提供的答案似乎对我不起作用，事实证明，诀窍是: ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password

(完整的答案在这里:在MySQL 5.7用" plugin: auth_socket "修改用户密码)

你可以查看mysql根密码，好吧，我已经在mysql 5.5上尝试过了，所以不知道其他新版本是否工作良好

nano ~/.my.cnf

系统:

中佐的Linux 7 位于华盛顿市郊1414区

过程:

Open two shell sessions, logging in to one as the Linux root user and the other as a nonroot user with access to the mysql command. In your root session, stop the normal mysqld listener and start a listener which bypasses password authentication (note: this is a significant security risk as anyone with access to the mysql command may access your databases without a password. You may want to close active shell sessions and/or disable shell access before doing this): # systemctl stop mysqld # /usr/sbin/mysqld --skip-grant-tables -u mysql & In your nonroot session, log in to mysql and set the mysql root password: $ mysql mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass'); Query OK, 0 rows affected, 1 warning (0.01 sec) mysql> quit; In your root session, kill the passwordless instance of mysqld and restore the normal mysqld listener to service: # kill %1 # systemctl start mysqld In your nonroot session, test the new root password you configured above: $ mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. ... mysql>