How to Enable MySQL general Log in Mysql 5.6

    vim /etc/mysql/my.cnf

    [mysqld]
    general_log_file = /var/log/mysql/mysql.log
    general_log = 1

Connect through mysql (mysql -u -p) and run :

    SET general_log = 1;

Restart MySql

    sudo service mysql restart 

Source: * AskUbuntu MySQL