Add DocumentRoot location (#22799)

guide/english/apache/index.md

@@ -21,3 +21,31 @@ sudo yum install httpd
 ```
 pacman -S apache
 ```
+
+### Getting Started
+Once you have Apache installed you need to know where to put your HTML documents. This location is generally referred to as the `DocumentRoot`. This location is usually `/var/www/html` on most Linux systems. Follow the instructions below to find the configuration file for Apache and the `DocumentRoot`.
+
+#### Command
+``` 
+~$ sudo grep "DocumentRoot" -R /etc/
+```
+
+The `-R` flag will cause grep to search recursively through the `/etc` directory and print out the full path of the file that it finds the `DocumentRoot` keyword in.
+
+#### Ubuntu output
+```
+/etc/apache2/sites-available/000-default.conf:  DocumentRoot /var/www/html
+/etc/apache2/sites-available/default-ssl.conf:          DocumentRoot /var/www/html
+/etc/apache2/sites-enabled/000-default.conf:    DocumentRoot /var/www/html
+```
+
+#### Centos output
+``` 
+/etc/httpd/conf/httpd.conf  DocumentRoot /var/www/html
+```
+
+#### References
+- Installation and Configurations guides
+   - [Ubuntu](https://tutorials.ubuntu.com/tutorial/install-and-configure-apache#2)
+   - [CentOS](https://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-apache-config-ui.html)
+   - [Arch Linux](https://wiki.archlinux.org/index.php/Apache_HTTP_Server)