The configuration of the Apache HTTP server is one of the most simple one which I have seen. You practically only:

• Apache Configuration
• Security Configuration

The configuration files are located:

root@dokuwiki httpd]# ls -lart
total 20
drwxr-xr-x.  2 apache apache 4096 Jan 29  2018 error
drwxr-xr-x.  2 root   root   4096 Jul  4 03:37 conf
lrwxrwxrwx.  1 root   root     29 Jul  4 03:37 modules -> ../../usr/lib64/httpd/modules
lrwxrwxrwx.  1 root   root     19 Jul  4 03:37 logs -> ../../var/log/httpd
lrwxrwxrwx.  1 root   root     19 Jul  4 03:37 run -> ../../var/run/httpd
drwxr-xr-x.  5 root   root   4096 Jul  4 03:37 .
drwxr-xr-x.  2 root   root   4096 Aug 16 03:32 conf.d
drwxr-xr-x. 97 root   root   4096 Aug 17 06:44 ..
[root@dokuwiki httpd]# pwd
/etc/httpd
[root@dokuwiki httpd]# 

So let's get going

The Apache configuration is rather simple and it is located in the conf folder:

[root@dokuwiki conf]# pwd
/etc/httpd/conf
[root@dokuwiki conf]# ls -alrt
total 56
-rw-r--r--. 1 root root 32363 Feb  7  2018 httpd.conf
-rw-r--r--. 1 root root 13139 Jun 19 15:45 magic
drwxr-xr-x. 2 root root  4096 Jul  4 03:37 .
drwxr-xr-x. 5 root root  4096 Jul  4 03:37 ..
[root@dokuwiki conf]# 

The configuration the httpd.conf file contains information about the server admin, port on which it listens, log and error location and others:

<VirtualHost IP:80>
    ServerAdmin [email protected] 
    DocumentRoot /etc/dokuwiki
    ServerName www.jdbwiki.tech
    ErrorLog logs/error_log
    CustomLog logs/access_log common
</VirtualHost>

<VirtualHost IP:443>
    ServerName www.jdbwiki.tech
    DocumentRoot /etc/dokuwiki
    ErrorLog logs/error_log
    CustomLog logs/access_log common
</VirtualHost>

This configuration is located in the configuration file: 

The security configuration, as you might guess, contains data about SSL, Ciphers and others security configurations.

These files are located in the conf.d directory:

[root@dokuwiki conf.d]# pwd
/etc/httpd/conf.d
[root@dokuwiki conf.d]# ls -lart
total 44
-rw-r--r--. 1 root root  893 Jan 25  2018 dokuwiki.conf.rpmsave
-rw-r--r--. 1 root root 9431 Jan 28  2018 ssl.conf
-rw-r--r--. 1 root root  336 Jan 30  2018 jdbwiki.tech.conf.bkp
-rw-r--r--. 1 root root  282 Jan 30  2018 .htaccess
-rw-r--r--. 1 root root  299 Feb 19 11:24 welcome.conf
-rw-r--r--. 1 root root  392 Jun 19 15:45 README
drwxr-xr-x. 5 root root 4096 Jul  4 03:37 ..
-rw-r--r--. 1 root root 1675 Aug 15 07:38 php.conf

It is possible to have the entire configuration in the httpd.conf file, but again for security reasons it is recommended to keep these configurations separate: