Install and Configure Upload Progress (PECL uploadprogress) on Ubuntu 14.04 / Drupal

1. INSTALL DEPENDENCIES

 sudo apt-get -y install php5-dev make  

2. INSTALL via PECL

 sudo pecl install uploadprogress  

3. CONFIGURE UPLOAD PROGRESS
Create a PHP uploadprogress configuration file.

 sudo gedit /etc/php5/mods-available/uploadprogress.ini  
 and add the line below and save your file 
 extension=uploadprogress.so  

4 ENABLE THE PHP UPLOADPROGRESS MODULE

 sudo php5enmod uploadprogress  

5. RESTART APACHE SERVICE

 sudo service apache2 restart  

Unsintall PECL:

If you would like to uninstal PECL execute the following command in your terminal:

 sudo pecl uninstall uploadprogress