https://itsfoss.com/take-screenshot-linux/
flameshot Feature Overview
Annotate (highlight, point, add text, box in) Blur part of an image Crop part of an image Upload to Imgur Open screenshot with another app Flameshot is a quite impressive screenshot tool which arrived on GitHub last year.
If you have been searching for a screenshot tool that helps you annotate, blur, mark, and upload to imgur while being actively maintained unlike some outdated screenshot tools, Flameshot should be the one to have installed.
Fret not, we will guide you how to install it and configure it as per your preferences.
To install it on Ubuntu, you just need to search for it on Ubuntu Software center and get it installed. In case you want to use the terminal, here’s the command for it:
sudo apt install flameshot
If you face any trouble installing, you can follow their official installation instructions. After installation, you need to configure it. Well, you can always search for it and launch it, but if you want to trigger the Flameshot screenshot tool by using PrtSc key, you need to assign a custom keyboard shortcut.
Here’s how you can do that:
Head to the system settings and navigate your way to the Keyboard settings.
You will find all the keyboard shortcuts listed there, ignore them and scroll down to the bottom. Now, you will find a + button.
Click the “+” button to add a custom shortcut. You need to enter the following in the fields you get:
Name: Anything You Want
Command: /usr/bin/flameshot gui
Finally, set the shortcut to PrtSc – which will warn you that the default screenshot functionality will be disabled – so proceed doing it.
For reference, your custom keyboard shortcut field should look like this after configuration:
Map keyboard shortcut with Flameshot