The online sales of U.S. would be approximately $278.9 billion by the end of 2015, according to the stats of Forrester Research, a technology and research company based in Cambridge, MA. So, leaving the boundaries of brick and mortar stores and entering the web world is crucial to grab the online revenue generating opportunities.
The online battle is heating up with growing customer expectations, and never-ending business growth dreams of merchants. An ecommerce store with a single product may have buyers of different age group, different personalities, and different preferences. …

Here are some linux commands (pactl and amixer) to increase and decrease volume. You can also use these commands to set keyboard shortcut to increase and decrease volume.
pactl