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

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>

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”。

MySQL 5.7及以上版本在MySQL日志文件中保存root。

请试试这个:

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

我被这个问题困扰了几分钟，下面是唯一可行的解决方案: https://phoenixnap.com/kb/access-denied-for-user-root-localhost

sudo mysql ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password Mysql -u root -p

如果您在过去已经设置了密码，mysql -uroot -p解决方案将不起作用，

在我的例子中，我使用了上面的一些答案来解决这个问题(Ubuntu 16)。结果是:

sudo service mysql stop
sudo mysqld_safe --skip-grant-tables &

如果你在屏幕上看到这段文字: mysqld_safe UNIX套接字文件目录“/var/run/mysqld”不存在。 然后做:

sudo mkdir -p /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld

sudo mysqld_safe --skip-grant-tables & # Look at the & at the end! 

进入其他终端设置密码如下:

sudo mysql -u root

mysql> use mysql;
mysql> SET PASSWORD FOR 'root'@'localhost'=PASSWORD('__NEW__PASSWORD__');
mysql> flush privileges;
mysql> quit;

然后重新启动服务并登录

# end mysqld_safe in the other terminal
sudo service mysql start
sudo mysql -h 127.0.0.1 -uroot -p