A quick guide on installing WordPress on an Ubuntu server.

Begin by downloading the latest WordPress image to the home directory.

$ cd ~
$ wget -c http://wordpress.org/latest.tar.gz

Extract the image

$ tar -xzvf latest.tar.gz

Copy the extracted files to the root website folder

$ sudo rsync -av wordpress/* /var/www/html/

Setup permissions

$ sudo chown -R www-data:www-data /var/www/html/
$ sudo chmod -R 755 /var/www/html/

Setup the default database for the WordPress server to use

$ mysql -u root -p
mysql> CREATE DATABASE wp_myblog;
mysql> GRANT ALL PRIVILEGES ON wp_myblog.* TO <user>@'localhost' IDENTIFIED BY <password>;
mysql> EXIT;

Setup a WordPress configuration file based off the sample provided.

$ cd /var/www/html/ 
$ sudo mv wp-config-sample.php wp-config.php
$ sudo nano wp-config.php

Update with the database and user names, and user passwords

define('DB_NAME', 'your_database_name');
define('DB_USER', 'your_database_username');
define('DB_PASSWORD', 'your_database_user_password');

Restart apache

$ sudo systemctl restart apache2.service
$ sudo systemctl restart mysql.service

Run the WordPress install script, by going to WEBSITE/wp-admin/install.php and following the instructions.

For completeness, configure Apache to show the WordPress main page by default.

$ sudo nano /etc/apache2/mods-enabled/dir.conf

Adjust this file by moving index.php to the front of the list (so that apache defaults it to the default view)
DirectoryIndex index.php index.html index.cgi index.pl index.xhtml index.htm