Does anyone know, how to change(or reinstall) default path for apache configuration files?
configuration file in
...
/etc/apache2/apache2.conf
/etc/apache2/httpd.conf
....
or something else
i'm working on ubuntu linux 13.04 with apt-get installed.
I think what you are after is the -f flag that let you specify a main configuration file at startup. It's explained in detail in Starting Apache document section.
Hope it helps.