reset master;
show master status;
File	Position	Binlog_do_db	Binlog_ignore_db
master-bin.001	79		
reset slave;
show slave status;
Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
change master to master_host='127.0.0.1';
show slave status;
Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
127.0.0.1	test	MASTER_PORT	7		4	slave-relay-bin.001	4		No	No			0		0	0	4
change master to master_host='127.0.0.1',master_user='root',
master_password='',master_port=MASTER_PORT;
show slave status;
Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
127.0.0.1	root	MASTER_PORT	7		4	slave-relay-bin.001	4		No	No			0		0	0	4
slave start;
show slave status;
Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
127.0.0.1	root	MASTER_PORT	7	master-bin.001	79	slave-relay-bin.001	120	master-bin.001	Yes	Yes			0		0	79	120
drop table if exists t1;
create table t1 (n int);
insert into t1 values (10),(45),(90);
select * from t1;
n
10
45
90
drop table t1;