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      How To Install the Apache Web Server on Ubuntu 18.04 [Quickstart]


      Introduction

      The Apache HTTP server is the most widely-used web server in the world. It provides many powerful features, including dynamically loadable modules, robust media support, and extensive integration with other popular software.

      In this guide, we’ll explain how to install an Apache web server on your Ubuntu 18.04 server. For a more detailed version of this tutorial, please refer to How To Install the Apache Web Server on Ubuntu 18.04.

      Prerequisites

      Before you begin this guide, you should have the following:

      • An Ubuntu 18.04 server and a regular, non-root user with sudo privileges. Additionally, you will need to enable a basic firewall to block non-essential ports. You can learn how to configure a regular user account and set up a firewall for your server by following our initial server setup guide for Ubuntu 18.04.

      When you have an account available, log in as your non-root user to begin.

      Step 1 — Installing Apache

      Apache is available within Ubuntu’s default software repositories, so you can install it using conventional package management tools.

      Update your local package index:

      Install the apache2 package:

      Step 2 — Adjusting the Firewall

      Check the available ufw application profiles:

      Output

      Available applications: Apache Apache Full Apache Secure OpenSSH

      Let's enable the most restrictive profile that will still allow the traffic you've configured, permitting traffic on port 80 (normal, unencrypted web traffic):

      Verify the change:

      Output

      Status: active To Action From -- ------ ---- OpenSSH ALLOW Anywhere Apache ALLOW Anywhere OpenSSH (v6) ALLOW Anywhere (v6) Apache (v6) ALLOW Anywhere (v6)

      Step 3 — Checking your Web Server

      Check with the systemd init system to make sure the service is running by typing:

      • sudo systemctl status apache2

      Output

      ● apache2.service - The Apache HTTP Server Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled) Drop-In: /lib/systemd/system/apache2.service.d └─apache2-systemd.conf Active: active (running) since Tue 2018-04-24 20:14:39 UTC; 9min ago Main PID: 2583 (apache2) Tasks: 55 (limit: 1153) CGroup: /system.slice/apache2.service ├─2583 /usr/sbin/apache2 -k start ├─2585 /usr/sbin/apache2 -k start └─2586 /usr/sbin/apache2 -k start

      Access the default Apache landing page to confirm that the software is running properly through your IP address:

      http://your_server_ip
      

      You should see the default Ubuntu 18.04 Apache web page:

      Apache default page

      When using the Apache web server, you can use virtual hosts (similar to server blocks in Nginx) to encapsulate configuration details and host more than one domain from a single server. We will set up a domain called example.com, but you should replace this with your own domain name. To learn more about setting up a domain name with DigitalOcean, see our introduction to DigitalOcean DNS.

      Create the directory for example.com, using the -p flag to create any necessary parent directories:

      sudo mkdir -p /var/www/example.com/html
      

      Assign ownership of the directory:

      • sudo chown -R $USER:$USER /var/www/example.com/html

      The permissions of your web roots should be correct if you haven't modified your unmask value, but you can make sure by typing:

      • sudo chmod -R 755 /var/www/example.com

      Create a sample index.html page using nano or your favorite editor:

      • nano /var/www/example.com/html/index.html

      Inside, add the following sample HTML:

      /var/www/example.com/html/index.html

      <html>
          <head>
              <title>Welcome to Example.com!</title>
          </head>
          <body>
              <h1>Success!  The example.com server block is working!</h1>
          </body>
      </html>
      

      Save and close the file when you are finished.

      Make a new virtual host file at /etc/apache2/sites-available/example.com.conf:

      • sudo nano /etc/apache2/sites-available/example.com.conf

      Paste in the following configuration block, updated for our new directory and domain name:

      /etc/apache2/sites-available/example.com.conf

      <VirtualHost *:80>
          ServerAdmin admin@example.com
          ServerName example.com
          ServerAlias www.example.com
          DocumentRoot /var/www/example.com/html
          ErrorLog ${APACHE_LOG_DIR}/error.log
          CustomLog ${APACHE_LOG_DIR}/access.log combined
      </VirtualHost>
      

      Save and close the file when you are finished.

      Enable the file with a2ensite:

      • sudo a2ensite example.com.conf

      Disable the default site defined in 000-default.conf:

      • sudo a2dissite 000-default.conf

      Test for configuration errors:

      • sudo apache2ctl configtest

      You should see the following output:

      Output

      Syntax OK

      Restart Apache to implement your changes:

      • sudo systemctl restart apache2

      Apache should now be serving your domain name. You can test this by navigating to http://example.com, where you should see something like this:

      Apache virtual host example

      Conclusion

      Now that you have your web server installed, you have many options for the type of content to serve and the technologies you want to use to create a richer experience.

      If you'd like to build out a more complete application stack, check out this article on how to configure a LAMP stack on Ubuntu 18.04.



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