I’ve already written about how to find Apache server’s main configuration (httpd.conf or apache2.conf) and virtual host configuration files by yourself in the following articles:

• Apache Web Server (HTTPD) Find Location Path to Main Server Configuration
• Find the Location of Apache Web Server Configuration Files in Unix Like Systems

But I thought maybe I should also put a quick reference to the paths directly for different unix-based or unix-like systems. The paths you see below should most likely be correct for new or default httpd installations.

Operating System	Main Config Location	Virtual Hosts Location
Ubuntu/Debian	/etc/apache2/apache2.conf	/etc/apache2/sites-available symlinked in /etc/apache2/sites-enabled
CentOS and Fedora	/etc/httpd/conf/httpd.conf	/etc/httpd/conf.d
FreeBSD	/usr/local/etc/apache24	/usr/local/etc/apache24/Includes
macOS	/private/etc/apache2/httpd.conf	/private/etc/apache2/other