ERROR 1045 (28000): Access denied for user 'root'@'SR3' (using password: YES)

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解决方案：

[mysql@SR3 ~]$ mysql -h 10.86.87.155 -uroot -pinfohow
ERROR 1045 (28000): Access denied for user 'root'@'SR3' (using password: YES)
[mysql@SR3 ~]$ mysql -hlocalhost -uroot -pinfohow
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.5.16-log Source distribution

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.

mysql> update user set password=PASSWORD("infohow") where user="root";
ERROR 1046 (3D000): No database selected
mysql> use mysql;
Database changed
mysql> update user set password=PASSWORD("infohow") where user="root";
Query OK, 3 rows affected (0.03 sec)
Rows matched: 4 Changed: 3 Warnings: 0

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

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> exit
Bye
[mysql@SR3 ~]$ mysql -h 10.86.87.155 -uroot -pinfohow
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.5.16-log Source distribution

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.

mysql> exit