环境：centos6.2，mysql5.5.25
master：192.168.131.5
slave：192.168.131.6

master配置文件，具体含义查看mysql5.5手册。

server-id=1
log-bin=/var/log/mysql-binlog/bin
binlog-do-db=test
binlog-ignore-db=mysql

创建同步用的用户并赋予replication slave权限

create user 'rep'@'192.168.%' identified by 'test';
grant replication slave on *.* to 'rep'@'192.168.%';
flush privileges;

重启mysql使配置生效

mysql> show master status;
+------------+----------+--------------+------------------+
| File       | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------+----------+--------------+------------------+
| bin.000001 | 107      | test         | mysql            |
+------------+----------+--------------+------------------+

slave配置
mysql5.1.7版本以后已经不支持把master配置属性写入my.ini文件中了，只需把同步的数据库和需要忽略的数据库写入

server-id=2
replicate-do-db=test
replicate-ignore-db=mysql

重启mysql使配置生效

用change master语句指定同步位置

stop slave;
change master to master_host='192.168.131.5', master_user='rep', master_password='test', master_log_file='bin.000001', master_log_pos=107;
start slave;

master_log_file和master_log_pos可以在master上用show master status查看，一般来说应该是先锁表(flush tables with read lock)，导数据到slave上，用change master指定同步位置，master上unlock tables。

mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.131.5
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: bin.000001
Read_Master_Log_Pos: 485
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 625
Relay_Master_Log_File: bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test
Replicate_Ignore_DB: mysql
Replicate_Do_Table: 
Replicate_Ignore_Table: 
Replicate_Wild_Do_Table: 
Replicate_Wild_Ignore_Table: 
Last_Errno: 0
Last_Error: 
Skip_Counter: 0
Exec_Master_Log_Pos: 485
Relay_Log_Space: 782
Until_Condition: None
Until_Log_File: 
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File: 
Master_SSL_CA_Path: 
Master_SSL_Cert: 
Master_SSL_Cipher: 
Master_SSL_Key: 
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error: 
Last_SQL_Errno: 0
Last_SQL_Error: 
Replicate_Ignore_Server_Ids: 
Master_Server_Id: 1
1 row in set (0.00 sec)

Slave_IO_Running: Yes
Slave_SQL_Running: Yes
说明没问题，如果有错根据Last_IO_Error和Last_SQL_Error提示排查即可。