1、因安全要求，需要修改mysql同步用戶repl的密碼。在主庫修改完后，從庫最佳修改同步用戶密碼的方式  D

change master to master_host='主庫IP',master_user='repl',master_password='new password',master_log_file='binlog.020',master_log_pos='136';#其中master_log_file是show slave status查詢的Master_Log_File的值，master_log_pos是Read_Master_Log_Pos的值
B
change master to master_host='主庫IP',master_user='repl',master_password='new password',master_log_file='binlog.020',master_log_pos='154';#其中master_log_file是show slave status查詢的Relay_Master_Log_File的值，master_log_pos是Exec_Master_Log_Pos的值
C
change master to master_user='repl',master_password='new password';

change master to master_password='new password';