Shutter is my favorite screenshot tool on Linux. This tutorial is going to show you how to install Shutter on Elementary OS Luna. Shutter is far better than default screenshot tool on Elementary OS. It comes with a simple but useful image editor. We can take screenshot in various ways such as free rectangle, window under cursor and many others. If you have account on online image sharing website such as imageshack, ubuntupic, twitpic, imagebanana etc. You can directly upload the screenshot to those website from Shutter.
To install Shutter on Elementary OS, simply use this command
sudo apt-get install shutter
In a minute, Shutter should be ready.