[TYPO3-linux] how to find out the groupname apache is running as?

[Michael Bakonyi]

Hi,

as recommened in the install-doc of Typo3 I'd like to change the group 
to the group, Apache is running as (and afterwards the rights) of 
several folders of the dummy-package.

I read somewhere, that you can find the group-name of Apache in 
etc/apache2/httpd.conf but there's no apache2-folder on the server, 
Typo3 is stored. I also tried "www-data", but that's not the proper name.

As I don't know much about Linux: where else could this file be stored 
or is there a bash-command to find out, which groups are running on the 
system?

Background-info: it's not my server, it's an official provider's server 
where I have read-access to the root-level of the folders e.g. etc/, 
dev/ etc. - which is unbelievable to me as it's not a  managed server. 
But I want to use this "liberty of action" to find the httpd.conf or 
another way, to get the information about the Apache-groupname.

Thanks in advance,
Michael