Use AppImage in UBuntu

 To use AppImage in Ubuntu, you need to12:

1. Install FUSE, a utility that some AppImage apps require to run. You can install it with the command sudo apt install fuse.
2. Download the .appimage package of the software you want to use. There are many software that are available in AppImage format, such as GIMP, Krita, etc.
3. Make the .appimage file executable. You can do this by right-clicking on the file, selecting Properties, then Permissions, then checking the box that says Allow executing file as program.
4. Run the .appimage file by double-clicking on it or by using the command ./filename.appimage.