There's your problem. Run these commands:

sudo chown -R www-data. /var/www

find /var/www -type d -exec chmod 755 {} \;

find /var/www -type f -exec chmod 644 {} \;

Check Apache's error logs, do you see anything?

tail /var/log/apache2/error.log

Hi,
The following errors are displayed:

PHP Warning: require_once(/var/www/wp-content/db.php): failed to open stream: Permission denied in /var/www/wp-includes/load.php on line 329
PHP Fatal error: require_once(): Failed opening required '/var/www/wp-content/db.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/wp-includes/load.php on line 329
File does not exist: /var/www/favicon.ico

"... with the help of the article provided here."

Which one? There are over 7 Ubuntu-WordPress articles.

You might be encountering a permissions problem. What's the output of

ls -la /path/to/WordPress/Installation/

@pablo:
This one: https://www.digitalocean.com/community/articles/how-to-install-wordpress-on-ubuntu-12-04

Is it /var/www for /path/to........ ? Sorry but I'm completely New to this. :)

-rw-r--r-- for files
drwxr-xr-x for dirs

Do you see root:root anywhere in there? It needs to be all www-data:www-data.

@Pablo:
Here is the full info:
drwxr-xr-x 5 tushar tushar 4096 Dec 2 09:30 .
drwxr-xr-x 12 root root 4096 Dec 2 08:34 ..
-rw-r--r-- 1 root root 45 Dec 2 09:10 .htpasswd
-rw-r--r-- 1 www-data www-data 177 Dec 2 08:34 index.html
-rw-r--r-- 1 www-data www-data 418 Sep 25 00:18 index.php
-rw-r--r-- 1 www-data www-data 19929 Jan 18 2013 license.txt
-rw-r--r-- 1 www-data www-data 7128 Oct 23 20:08 readme.html
-rw-r--r-- 1 www-data www-data 4892 Oct 4 14:12 wp-activate.php
drwxr-xr-x 9 www-data www-data 4096 Oct 29 20:08 wp-admin
-rw-r--r-- 1 www-data www-data 271 Jan 8 2012 wp-blog-header.php
-rw-r--r-- 1 www-data www-data 4795 Sep 6 01:38 wp-comments-post.php
-rw-r--r-- 1 www-data www-data 3172 Dec 2 15:37 wp-config.php
-rw-r--r-- 1 www-data www-data 3177 Nov 1 2010 wp-config-sample.php
drwxr-xr-x 10 www-data www-data 4096 Dec 2 15:08 wp-content
-rw-r--r-- 1 www-data www-data 2932 Sep 25 00:18 wp-cron.php
drwxr-xr-x 11 www-data www-data 4096 Oct 29 20:08 wp-includes
-rw-r--r-- 1 www-data www-data 2380 Sep 25 00:18 wp-links-opml.php
-rw-r--r-- 1 www-data www-data 2359 Sep 12 06:57 wp-load.php
-rw-r--r-- 1 www-data www-data 31739 Oct 23 14:40 wp-login.php
-rw-r--r-- 1 www-data www-data 7772 Oct 22 17:22 wp-mail.php
-rw-r--r-- 1 www-data www-data 10585 Oct 7 19:34 wp-settings.php
-rw-r--r-- 1 www-data www-data 25673 Oct 22 17:22 wp-signup.php
-rw-r--r-- 1 www-data www-data 4026 Sep 25 00:18 wp-trackback.php
-rw-r--r-- 1 www-data www-data 3015 Oct 23 14:40 xmlrpc.php

What's the output of

ls -lah /var/www/wp-content

?

@kamal:
It's:
drwxr-xr-x 10 www-data www-data 4.0K Dec 2 15:08 .
drwxr-xr-x 5 tushar tushar 4.0K Dec 2 09:30 ..
-rw------- 1 root root 1.2K Dec 2 13:12 advanced-cache.php
drwx------ 2 root root 4.0K Dec 2 13:58 backup-db
drwx------ 8 root root 4.0K Dec 2 13:58 cache
-rw------- 1 root root 1.5K Dec 2 13:33 db.php
-rw------- 1 root root 28 Jan 8 2012 index.php
-rw------- 1 root root 4.9K Dec 2 13:33 object-cache.php
drwx------ 6 root root 4.0K Dec 2 13:58 pageflip
drwxr-xr-x 8 www-data www-data 4.0K Dec 2 15:08 plugins
drwxr-xr-x 5 www-data www-data 4.0K Dec 2 15:08 themes
drwx------ 2 root root 4.0K Dec 2 13:15 upgrade
drwx------ 4 root root 4.0K Dec 2 15:32 uploads
drwx------ 2 root root 4.0K Dec 2 13:58 w3tc-config

Thank you for the support.
It really helped.