#service mysqld start

#mysql -u root 

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.1.52 Source distribution


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mysql> 

mysql>use mysql

mysql>update user set password=password('你的新密码') where user='root';            //注意;号

mysql>quit

#service mysqld restart

mysql> 

ysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)