Shutter
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http://shutter-project.org/
Shutter is a feature-rich screenshot program for Linux based operating systems such as Ubuntu. You can take a screenshot of a specific area, window, your whole screen, or even of a website – apply different effects to it, draw on it to highlight points, and then upload to an image hosting site, all within one window. Shutter is free, open-source, and licensed under GPL v3.


PPA
https://launchpad.net/~shutter/+archive/ubuntu/ppa

Installation with image editing capability in Debian/Ubuntu
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sudo add-apt-repository -y ppa:shutter/ppa && sudo apt-get update && sudo apt-get -y install shutter libgoo-canvas-perl && sudo ldconfig && sudo dpkg --configure -a && sudo apt-get clean