Apache Lab - devinziegler/Devin-Tech-Journal GitHub Wiki

Apache is a tool used for hosting web servers. This entry will show some Apache basics, including installation using a CENTOS system.

Getting Started:

Installing Apache:

yum install httpd

Allowing web ports in firewall:

Default port for HTTP is 80, default port for HTTPS is 443. CENTOS by default does not allow incoming traffic through these ports.

  • Edit the firewall using the following commands: List Current Firewall Rules:
firewall-cmd --list-all

Add a permeant rule to the firewall:

firewall-cmd --add-service=<service_name> --permanent

Restart the firewall service:

firewall-cmd --reload

Starting Web Server:

Type this command to start the web server:

systemctl start httpd

Basic Server Configuration:

The default page shown when a client connects will be the Apache welcome page. This can be disabled by making index.html file in the web root directory, then comment out the the file located at /etc/httpd/conf.d/welcome.conf.

Starter for index.html:

<!DOCTYPE html>
<html>
<body>

<p>Welcome to my web server.</p>

</body>
</html>
  • This is a nifty diagram of how a html file is formatted. github_example

Intro To PHP scripting

PHP is an open source scripting language used for server side scripting. In my case, I had to edit the httpd config file to allow php scripting.

Add the following string to /etc/httpd/conf/httpd.conf

AddType application/x-httpd-php .php

Make sure to restart httpd after editing using the following command:

systemctl restart httpd

Below is an example of a for loop that will count to 10:

<?php
for ($x = 1; $x <= 10; $x++> {
     echo "X is equal to: $x <br>";
}
?>
  • HTML and PHP files should go into the webroot directory, /var/www/html.
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