8 years ago
If you like trying different beautiful themes on your Gnome desktop, you may would like to clean away those useless themes. In right-clicking on Desktop - > Change Desktop Background -> Theme, there’s a Delete button at bottom, but it is un-click-able.
Actually, it’s just a user permission problem. To solve this, run this command on terminal
This will open the previous window with the super user privilege, and you can click Delete button to remove the themes you don’t want to use anymore.