- Open the MySQL config file, which is located at /etc/mysql/my.cnf on Linux systems.
- Then write the following lines at the end of that file.
general_log_file = /var/log/mysql/general_mysql.log
general_log = on
Restart your MySQL server (e.g. by executing "sudo service mysql restart" on Ubuntu Linux systems). Now you can follow all new queries as they are executed by this command:
tail -f /var/log/mysql/general_mysql.log
You can leave this program in command line by pressing CTRL+C.
For disabling, just set "general_log" to "off" or comment the out the previous lines in /etc/mysql/my.cnf by writing the # character at the beginng of the lines, save and restart the MySQL server again.
Update: Alternative setting by "general_log" variable
Recently the approach from above was not possible on my MariaDB server in Linux Mint 18.1. The log file was just not written. Even if I have created it. Then I could enable the general_log by variable. For this login into your MariaDB/MySQL server via command line. Then enable the general_log:
SET GLOBAL general_log = On;
Check all your variables which have something to do with "log" by this command:
show variables like '%log%';
The filename of the general_log is stored in that variable: "general_log_file". The default general log folder on Ubuntu/Debian based Linux systems (like Linux Mint) is: