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1.先停止数据库服务器

service  mysqld stop

2.vim /etc/my.cnf

3.配置文件添加skip-grant-tables

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 [root@VM_0_8_centos ~]# vim /etc/my.cnf   # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html   [mysqld] # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock skip-grant-tables      此处！！！！！！ # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0

4.重启数据库

 systemctl restart mysql

5.登录数据库

mysql -uroot -p

如果询问密码，直接空密码登录

6.set password for root@localhost = password('123456');括号里面的密码你自己修改。

7.mysql -uroot -p123456 登录成功

PS：下面看下Mysql初始化root密码和允许远程访问

mysql默认root用户没有密码，输入mysql –u root 进入mysql

1、初始化root密码

进入mysql数据库

? 1 mysql>update user set password=PASSWORD(‘123456') where User='root';

2、允许mysql远程访问,可以使用以下三种方式:

a、改表。

? 1 2 3 4 mysql -u root –p mysql>use mysql; mysql>update user set host = '%' where user = 'root'; mysql>select host, user from user;

b、授权。

例如，你想root使用123456从任何主机连接到mysql服务器。

? 1 mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;

如果你想允许用户jack从ip为10.10.50.127的主机连接到mysql服务器，并使用654321作为密码

? 1 2 mysql>GRANT ALL PRIVILEGES ON *.* TO 'jack'@'10.10.50.127' IDENTIFIED BY '654321' WITH GRANT OPTION; mysql>FLUSH RIVILEGES

c:在安装mysql的机器上运行：

? 1 2 3 4 5 6 7 8 //进入MySQL服务器 d:mysqlbin>mysql -h localhost -u root //赋予任何主机访问数据的权限 mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION //使修改生效 mysql>FLUSH PRIVILEGES //退出MySQL服务器 mysql>EXIT

总结

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原文链接：https://www.cnblogs.com/PiaoYu/archive/2020/06/05/13047560.html