How do I move a folder in Kubuntu?

You should be able to just cut and paste it. If you open two Dolphin windows, you can drag the folder from one to the other. If you're seeing a red circle when trying to drag, it might be a permissions issue. Make sure you're not trying to move it to a location that requires root access—stick to your home directory if possible.

Drag-and-drop in Dolphin generally prompts you to choose between cut or copy. But if you want a faster way and have appropriate access, just open a terminal and use the `mv` command to move the folders. It's a lot cleaner and skips those pesky graphical issues.

Linux uses 'directories' instead of 'folders', which can behave a bit differently. You might want to think of them as just files. You can use commands like `mv /oldlocation/ /newlocation/` to relocate them, or create a new directory and move the contents over that way.