MySQL 5.7的默认根密码是什么

Question

在使用root ID进行全新安装后无法登录到MySQL数据库,并且像其他较旧的MySQL版本一样无法登录到无/无密码

Answer 1

有很多答案说重新安装mysql或使用一些组合

mysqld_safe --skip-grant-tables

和/或

UPDATE mysql.user SET Password=PASSWORD('password')

和/或别的......

......这些都不适合我

这是我在Ubuntu 18.04上从顶部起作用的

特别赞赏这个答案让我从这个沮丧中解脱出来......

$ sudo apt install mysql-server
$ sudo cat /etc/mysql/debian.cnf

请注意以下行:

user     = debian-sys-maint
password = blahblahblah

然后:

$ mysql -u debian-sys-maint -p
Enter password: // type 'blahblahblah', ie. password from debian.cnf

mysql> USE mysql
mysql> SELECT User, Host, plugin FROM mysql.user;
+------------------+-----------+-----------------------+
| User             | Host      | plugin                |
+------------------+-----------+-----------------------+
| root             | localhost | auth_socket           |
| mysql.session    | localhost | mysql_native_password |
| mysql.sys        | localhost | mysql_native_password |
| debian-sys-maint | localhost | mysql_native_password |
+------------------+-----------+-----------------------+
4 rows in set (0.00 sec)

mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> COMMIT;  // When you don't have auto-commit switched on

或者:

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

要么:

// For MySQL 5.7+
UPDATE mysql.user SET authentication_string=PASSWORD('new_password') where user='root';

然后:

mysql> FLUSH PRIVILEGES;
mysql> COMMIT;  // When you don't have auto-commit switched on
mysql> EXIT

$ sudo service mysql restart
$ mysql -u root -p
Enter password: // Yay! 'new_password' now works!

Answer 2

从linux上的fresh安装MySQL-community-server 5.7后,您需要从/var/log/mysqld.log中找到临时密码以root身份登录.

1. grep 'temporary password' /var/log/mysqld.log
2. 运行mysql_secure_installation以更改新密码

参考:http://dev.mysql.com/doc/refman/5.7/en/linux-installation-yum-repo.html

Answer 3

MySQL 5.7改变了安全模型:现在MySQL root登录需要一个sudo

最简单(也是最安全)的解决方案是创建一个新用户并授予所需的权限.

1.连接到mysql

sudo mysql --user=root mysql

2.为phpMyAdmin创建用户

CREATE USER 'phpmyadmin'@'localhost' IDENTIFIED BY 'some_pass';
GRANT ALL PRIVILEGES ON *.* TO 'phpmyadmin'@'localhost' WITH GRANT OPTION;
FLUSH PRIVILEGES;

参考 - https://askubuntu.com/questions/763336/cannot-enter-phpmyadmin-as-root-mysql-5-7

Answer 4

如果你想安装无人值守的mysql或percona(比如我的ansible),你可以使用以下脚本:

# first part opens mysql log
# second part greps lines with temporary password
# third part picks last line (most recent one)
# last part removes all the line except the password
# the result goes into password variable

password=$(cat /var/log/mysqld.log | grep "A temporary password is generated for" | tail -1 | sed -n 's/.*root@localhost: //p')

# setting new password, you can use $1 and run this script as a file and pass the argument through the script

newPassword="wh@teverYouLikE"

# resetting temporary password

mysql -uroot -p$password -Bse "ALTER USER 'root'@'localhost' IDENTIFIED BY '$newPassword';"

Answer 5

MySQL 5.7 或更高版本在全新安装后会生成默认的临时密码。

要首先使用 MySQL，您需要从 .log 文件中的日志文件中获取该密码/var/log/mysqld.log。因此，请遵循以下过程：

1. grep 'temporary password' /var/log/mysqld.log

2. mysql_secure_installation

需要第二个命令来更改 MySQL 的密码以及进行某些其他更改，例如删除临时数据库、允许或禁止远程访问 root 用户、删除匿名用户等……

Answer 6

我的新Linux Mint 19默认已安装MySQL服务器5.7。

但是，什么是MySQL root密码？事实证明：

默认安装使用auth_socket身份验证代替密码！

如果使用相同的用户名登录Linux系统，则它允许无密码登录。要以MySQL root身份登录user，可以使用sudo：

sudo mysql --user=root

但是如何更改root密码？为了说明正在发生的情况，我创建了一个具有完全特权的新用户“ me”，该用户具有：

mysql> CREATE USER 'me'@'localhost' IDENTIFIED BY 'my_new_password';
mysql> GRANT ALL PRIVILEGES ON *.* TO 'me'@'localhost' WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;

比较“我”与“根”：

mysql> SELECT user, plugin, HEX(authentication_string)  FROM mysql.user WHERE user = 'me' or user = 'root';
+------+-----------------------+----------------------------------------------------------------------------+
| user | plugin                | HEX(authentication_string)                                                 |
+------+-----------------------+----------------------------------------------------------------------------+
| root | auth_socket           |                                                                            |
| me   | mysql_native_password | 2A393846353030304545453239394634323734333139354241344642413245373537313... |
+------+-----------------------+----------------------------------------------------------------------------+

由于它使用的是auth_socket，因此无法更改root密码：SET PASSWORD命令失败，并且mysql_secure_installation无法获得任何信息...

==>要改变这种备用身份验证模式并使MySQL root用户返回使用密码：

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

一个很好的解释。

有关更多详细信息，请参见MySQL手册。

Answer 7

似乎事情旨在避免开发人员设置 root 用户，更好的解决方案是：

sudo mysql -u root

然后创建一个普通用户，设置密码，然后使用该用户工作。

create user 'user'@'localhost' identified by 'user1234';
grant all on your_database.* to 'user'@'localhost';
select host, user from mysql.user;

然后尝试访问：

mysql -u user -p

繁荣！