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>

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

mysql服务器安装后的默认密码是:mysql

您无法查看散列后的密码;你唯一能做的就是重置!

停止MySQL:

sudo service mysql stop

or

$ sudo /usr/local/mysql/support-files/mysql.server stop

以安全模式启动:

$ sudo mysqld_safe --skip-grant-tables

(上面一行是整个命令)

这将是一个持续的命令，直到进程结束，所以打开另一个shell/终端窗口，登录时不需要密码:

$ mysql -u root

mysql> UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';

MySQL 5.7及以上版本:

mysql> use mysql; 
mysql> update user set authentication_string=password('password') where user='root'; 

退出MySQL命令行:

mysql> exit 

在正常模式下重启MySQL，首先停止安全模式实例:

$ mysqladmin -u root -p shutdown   # (when prompted, enter the new password just set)
$ sudo service mysql start

or

$ sudo /usr/local/mysql/support-files/mysql.server start

你的新密码是“password”。

我用另一种方法解决了这个问题，这对一些人来说可能更简单。

我这样做是因为我尝试在安全模式下启动，但无法连接到错误: ERROR 2002 (HY000):无法通过socket '/var/run/mysqld/mysqld连接到本地MySQL服务器。袜子”(2)

我所做的就是以root用户正常连接:

$ sudo mysql -u root

然后我创建了一个新的超级用户:

mysql> grant all privileges on *.* to 'myuser'@'%' identified by 'mypassword' with grant option;
mysql> quit

然后以myuser身份登录

$ mysql -u myuser -p -h localhost

尝试更改密码没有给我任何错误，但对我没有任何帮助，所以我放弃并重新创建根用户

mysql> drop user 'root'@'localhost;
mysql> mysql> grant all privileges on *.* to 'root'@'localhost' identified by 'mypassword' with grant option;

根用户现在正在使用新密码

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