ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

#1.停止mysql数据库

/etc/init.d/mysqld stop 

#2.执行如下命令

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

#3.使用root登录mysql数据库

mysql -u root mysql 

#4.更新root密码

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';

#5.刷新权限 

mysql> FLUSH PRIVILEGES; 

#6.退出mysql

mysql> quit 

#7.重启mysql

/etc/init.d/mysqld restart 

#8.使用root用户重新登录mysql

mysql -uroot -p 

Enter password: <输入新设的密码newpassword>