MySQL的binlog日志位置可通过show variables like '%datadir%';查看，直接打开无法查看，要看其内容2个办法：

1、登录到mysql查看binlog
只查看第一个binlog文件的内容
mysql> show binlog events;

查看指定binlog文件的内容
mysql> show binlog events in 'mysql-bin.000002';

mysql> show binlog events in 'mysql-bin.000001';
+------------------+------+-------------+-----------+-------------+-----------------------------------------------------------+
| Log_name        | Pos  | Event_type  | Server_id | End_log_pos | Info                                                      |
+------------------+------+-------------+-----------+-------------+-----------------------------------------------------------+
| mysql-bin.000001 |    4 | Format_desc |      195 |        106 | Server ver: 5.1.73-log, Binlog ver: 4                    |
| mysql-bin.000001 |  106 | Query      |      195 |        198 | use `Hadoop`; delete from user where id=3                |
| mysql-bin.000001 |  198 | Intvar      |      195 |        226 | INSERT_ID=4                                              |
| mysql-bin.000001 |  226 | Query      |      195 |        332 | use `hadoop`; INSERT INTO user (id,name)VALUES (NULL,1)  |
| mysql-bin.000001 |  332 | Query      |      195 |        424 | use `hadoop`; delete from user where id=3                |
| mysql-bin.000001 |  424 | Intvar      |      195 |        452 | INSERT_ID=5                                              |
| mysql-bin.000001 |  452 | Query      |      195 |        560 | use `hadoop`; INSERT INTO user (id,name)VALUES (NULL,222) |
| mysql-bin.000001 |  560 | Query      |      195 |        660 | use `hadoop`; DELETE FROM `user` WHERE (`id`='1')        |
| mysql-bin.000001 |  660 | Intvar      |      195 |        688 | INSERT_ID=6                                              |
| mysql-bin.000001 |  688 | Query      |      195 |        795 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('555')  |
| mysql-bin.000001 |  795 | Intvar      |      195 |        823 | INSERT_ID=7                                              |
| mysql-bin.000001 |  823 | Query      |      195 |        930 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('555')  |
| mysql-bin.000001 |  930 | Intvar      |      195 |        958 | INSERT_ID=8                                              |
| mysql-bin.000001 |  958 | Query      |      195 |        1065 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('555')  |
| mysql-bin.000001 | 1065 | Intvar      |      195 |        1093 | INSERT_ID=9                                              |
| mysql-bin.000001 | 1093 | Query      |      195 |        1200 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('555')  |
| mysql-bin.000001 | 1200 | Query      |      195 |        1300 | use `hadoop`; DELETE FROM `user` WHERE (`id`='9')        |
| mysql-bin.000001 | 1300 | Query      |      195 |        1400 | use `hadoop`; DELETE FROM `user` WHERE (`id`='8')        |
| mysql-bin.000001 | 1400 | Query      |      195 |        1500 | use `hadoop`; DELETE FROM `user` WHERE (`id`='7')        |
| mysql-bin.000001 | 1500 | Query      |      195 |        1600 | use `hadoop`; DELETE FROM `user` WHERE (`id`='4')        |
| mysql-bin.000001 | 1600 | Query      |      195 |        1700 | use `hadoop`; DELETE FROM `user` WHERE (`id`='5')        |
| mysql-bin.000001 | 1700 | Query      |      195 |        1800 | use `hadoop`; DELETE FROM `user` WHERE (`id`='6')        |
| mysql-bin.000001 | 1800 | Intvar      |      195 |        1828 | INSERT_ID=10                                              |
| mysql-bin.000001 | 1828 | Query      |      195 |        1935 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('555')  |
| mysql-bin.000001 | 1935 | Intvar      |      195 |        1963 | INSERT_ID=11                                              |
| mysql-bin.000001 | 1963 | Query      |      195 |        2070 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('666')  |
| mysql-bin.000001 | 2070 | Intvar      |      195 |        2098 | INSERT_ID=12                                              |
| mysql-bin.000001 | 2098 | Query      |      195 |        2205 | use `hadoop`; INSERT INTO `user` (`name`) VALUES ('777')  |
+------------------+------+-------------+-----------+-------------+-----------------------------------------------------------+

查看当前正在写入的binlog文件
mysql> show master status\G

mysql> show master status\G
*************************** 1. row ***************************
            File: mysql-bin.000002
        Position: 106
    Binlog_Do_DB:
Binlog_Ignore_DB: mysql,information_schema,performance_schema
1 row in set (0.00 sec)

获取binlog文件列表
mysql> show binary logs;

mysql> show binary logs;
+------------------+-----------+
| Log_name        | File_size |
+------------------+-----------+
| mysql-bin.000001 |      3548 |
| mysql-bin.000002 |      106 |
+------------------+-----------+
2 rows in set (0.00 sec)

2、用mysqlbinlog工具查看
 基于开始/结束时间
[root@hd3 ~]# mysqlbinlog --start-datetime='2016-08-02 00:00:00' --stop-datetime='2016-08-03 23:01:01' -d hadoop /var/lib/mysql/mysql-bin.000001

基于pos值，注：hadoop是库名，/var/lib/mysql/mysql-bin.000001是二进制文件路径
[root@hd3 ~]# mysqlbinlog --start-position=2098 --stop-position=2205 -d hadoop /var/lib/mysql/mysql-bin.000001

/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#160803 17:49:51 server id 195  end_log_pos 106        Start: binlog v 4, server v 5.1.73-log created 160803 17:49:51 at startup
# Warning: this binlog is either in use or was not closed properly.
ROLLBACK/*!*/;
BINLOG '
P76hVw/DAAAAZgAAAGoAAAABAAQANS4xLjczLWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAA/vqFXEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC
'/*!*/;
# at 2098
#160803 18:53:56 server id 195  end_log_pos 2205        Query  thread_id=1481  exec_time=115  error_code=0
use `hadoop`/*!*/;
SET TIMESTAMP=1470221636/*!*/;
SET @@session.pseudo_thread_id=1481/*!*/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
SET @@session.sql_mode=0/*!*/;
SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
/*!\C utf8 *//*!*/;
SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=8/*!*/;
SET @@session.lc_time_names=0/*!*/;
SET @@session.collation_database=DEFAULT/*!*/;
INSERT INTO `user` (`name`) VALUES ('777')
/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;