I am using mysql version 5.5.38 on Centos 6.4

```
$ mysql --version
mysql  Ver 14.14 Distrib 5.5.38, for Linux (x86_64) using readline 5.1

```

in the help it says 

```
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf

```

I dont have either `/etc/my.cnf` or `/etc/mysql/my.cnf` on my machine.

I created `/usr/etc/my.cnf` with following content

```
[mysqld]
default-storage-engine = InnoDB

```

I restarted mysql server. When I create a new table, it still uses the **MyISAM** as storage engine instead of **InnoDB**

If I use the `/etc/my.cnf` for my config file, it uses InnoDB as storage engine.

My question is why my settings are not working when using `/usr/etc/my.cnf` file ?

Can I also use two files as configuration files ?