开启和查看mysql的bin-log日志

[root@VM_0_7_centos data]# vim /etc/my.cnf 
[root@VM_0_7_centos data]# vim /etc/my.cnf 
[root@VM_0_7_centos data]# /etc/init.d/mysqld restart
Shutting down MySQL.... SUCCESS! 
Starting MySQL. SUCCESS! 
[root@VM_0_7_centos data]# grep log_bin /etc/my.cnf 
[root@VM_0_7_centos data]# grep log-bin /etc/my.cnf 
log-bin=/opt/mysql/data/mysql-bin

mysql> show variables like '%log_bin%';
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    2
Current database: wordpress

+---------------------------------+---------------------------------+
| Variable_name                   | Value                           |
+---------------------------------+---------------------------------+
| log_bin                         | ON                              |
| log_bin_basename                | /opt/mysql/data/mysql-bin       |
| log_bin_index                   | /opt/mysql/data/mysql-bin.index |
| log_bin_trust_function_creators | OFF                             |
| log_bin_use_v1_row_events       | OFF                             |
| sql_log_bin                     | ON                              |
+---------------------------------+---------------------------------+
6 rows in set (0.01 sec)