linux 安装mysql后设置root密码

在red hat 6.3 新装了一个mysql后发现初始密码root不能登录，出现错误

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

解决方案如下：

#service mysqld stop  
#mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

#mysql -u root mysql

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

service mysqld restart

# mysql -uroot -p
Enter password: <输入新设的密码newpassword>

mysql> quit
Bye
[root@localhost Desktop]# mysql -u root -p;
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

密码修改完成