报错集：给新创建的MySQL数据库设置用户密码时报错（error: ‘Access denied for user ‘root‘@‘localhost‘ (using password: NO)）

Posted 2022-08-03 handsomeboy-东

[root@mysql mysql]# mysqladmin -u root -p password
Enter password: 
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'

错误原因：安装完MySQL数据库后它自行设置了临时密码
解决方法：设置MySQL的主配置文件，在最后添加 skip-grant-tables（慎用）用来免密登录MySQL数据库，然后在数据库里面修改密码

[root@mysql mysql]# systemctl stop mysqld.service    #先停止MySQL数据库
[root@mysql mysql]# vim /etc/my.cnf
……………………
skip-grant-tables
保存退出
[root@mysql mysql]# systemctl start mysqld.service    #再启动MySQL数据库
[root@mysql mysql]# mysql -u root					  ##进入MySQL数据库
mysql> select * from  user;                           #以下为修复root用户权限设置
Database changed
mysql> select * from  user;
3 rows in set (0.00 sec)

mysql>  truncate table user;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql>  grant all privileges on *.* to root@localhost identified by 'admin123' with grant option;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> select host, user from user;                   #测试结果
+-----------+------+
| host      | user |
+-----------+------+
| localhost | root |
+-----------+------+
1 row in set (0.00 sec)

mysql> exit
Bye
[root@mysql mysql]# systemctl restart mysqld.service        #重启MySQL数据库
[root@mysql mysql]# mysql -u root -padmin123 #用新密码登录MySQL舒克即可
mysql>