成功启动mysql，但输入命令mysql时却出现错误，如何解决？

lijiank300

[root@localhost ~]# /etc/init.d/mysqld start
启动 MySQL：                                               [确定]
[root@localhost ~]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

lijiank300

已解决，原来是命令输错了[root@localhost ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 73
Server version: 5.0.37 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> q