A powerful open source screenshot and annotation tool for Linux, Flameshot
has a varied set of markup tools available, which include Freehand drawing,
Lines, Arrows, Boxes, Circles, Highlighting, Blur. Additionally, you can
customise the color, size and/or thickness of many of these image annotation
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install Flameshot, simply use the following command: