NOTE : Follow below given steps at your own risk .
1) give permissions to the /var/www/ directory
sudo chown -R $USER:$USER /var/www/
2) Install the Apache module mod_rewrite
a2enmod rewrite
3) Chnage the directory and keep the back up of the file “000-default”
cd /etc/apache2/sites-enabled/
sudo cp 000-default 000-default1
4) Edit the file 000-default
sudo vi 000-default
Look for the below given code
Options Indexes FollowSymLinks MultiViews
AllowOverride none
Order allow,deny
allow from all
Modify “AllowOverride none” to “AllowOverride All”
5) Restart Apache
sudo /etc/init.d/apache2 restart