MySQL: linux mysql access denied for user ‘root’@’localhost'(using password:YES)

linux安装完mysql后，使用程序连接报以上错误

Access denied for user 'root'@'localhost' (using password:YES)

解决方法，重新设置密码，步骤如下

1.先停掉原来的服务

service mysqld stop  或者   /etc/init.d/mysql stop

2.使用安全模式登陆，跳过密码验证

nohup mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

3.登陆

mysql -uroot  mysql

4.修改密码

mysql  > update user set authentication_string = password('123456') where user = 'root' and Host = 'localhost';

5.刷新权限

mysql > flush privileges;

6.重新使用正常模式登陆

#mysql -uroot -p
#enter password : 123456

可以正常登陆。

7.执行其他命令：show databases; 如果提示如下错误

You must reset your password using ALTER USER statement before   executing this statement.

8.重新将密码设置一遍即可

mysql > set password = password ('123456');

9.配置完成。

如果出现 Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)

若该路径下存在.sock文件，开启一下MySQL服务即可，/etc/init.d/mysql start

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