mysql-log

View turn on or not 

SELECT * from information_schema.GLOBAL_VARIABLES WHERE VARIABLE_NAME = 'LOG_BIN';
SHOW VARIABLES LIKE 'log_bin'; 
SHOW  BINARY LOGS; 

Turn on the Log

vi /etc/mysql/my.cnf   or /etc/my.cnf  or /usr/etc/my.cnf  or ~/.my.cnf


log-bin=mysql-bin

The log inside /var/log/mysql/error.log