CentOS installations comes with Apache. It have a default configuration. This configuration shows you a forbidden page if there is no index.html in your request directory. You can show directory content instead of forbidden page with enabling Indexes variable. I will show you how to enable it.

As you thik, It’s in Apache’s configuration file. But not httpd.conf, It’s in a configuration file which one included after httpd.conf, localated in /etc/httpd/conf.d/welcome.conf.

Edit welcome.conf with nano because I’m prefering nano, you can use what you want.

 # nano /etc/httpd/conf.d/welcome.conf.

In this file there is a line like this

 Options -Indexes

just replace the minus  with plus

  Options +Indexes

save the file and restart httpd.

 service httpd restart

If its still not enabled, open httpd.conf and search for “Options” parameter and add “+Indexes” after it.