Mysql configuration file sections

Question

I am trying to understand the different sections inside the my.ini configuration file ([client], [mysqld], [mysql]) and so on, I am looking for a guide describing each of the op

Answer 1

[mysql] applies to the mysql command line client - [mysql and client options]

[client] applies to all connecting clients (including mysql cli) - [mysql and client options]

[mysqld] applies to the mysql server - [server options]

[mysqldump] applies to the utility of the same name - [mysqldump options]

...etc

The difference between the (-) and the (_) is the context in which it is used.

(-) is used in command line parameters, where (_) is used in options file parameters.

You can see more in the docs: http://dev.mysql.com/doc/refman/5.5/en/option-files.html