Krita is a sketching and painting program. It is also be used for 2D animations and is considered an free and open source alternative to Adobe Animate. Their recommended way to use Krita is to download the App Image and run it as an executable. But this way you would have run the file from the terminal every time you want to use it. Wouldn't it be better if we could run the app as any other normal application! This tutorial explains how you can install Krita's AppImage (and for that matter any AppImage) and run it like you would run any other application.
chmod +x krita.appimage /usr/local/bin/ or ~/.local/bin/ using the cp command. Use sudo if you get the Permission Denied error. ./krita.appimage --appimage-extract squashfs-root in the same directory cd into the squashfs-root directory and open the file org.kde.krita.desktop in a text editor for editing. Exec=krita %F and replace krita with the location where you copied the AppImage. Eg. If you copied the AppImage to /usr/local/bin/, then the location of the AppImage is /usr/local/bin/krita.appimage. Save changes and exit. org.kde.krita.desktop file to /.local/share/applications/ directory. Krita but we still need to put the desktop icon in the proper directory. krita.png to /usr/share/pixmaps/ using sudo Alt+F2 and Run restart. You may even try restarting the computer.