Got error: 1045:

[root@gaosheng ~]# mysqlcheck arcerdb t1;
mysqlcheck: Got error: 1045: Access denied for user 'root'@'localhost' (using password: NO) when trying to connect
[root@gaosheng ~]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

[root@gaosheng ~]# mysql -uroot -parcerzhang
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 8
Server version: 5.0.77-log Source distribution

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

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> set passwrod for 'root'@'localhost' = password('');
ERROR 1193 (HY000): Unknown system variable 'passwrod'
mysql> set password for 'root'@'localhost' = password('');
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye
[root@gaosheng ~]# mysqlcheck arcerdb t1;
arcerdb.t1                                         OK
[root@gaosheng ~]#