May I humbly suggest Code: $ mv ~/MyDocs/doombatt48x48/* ~/.local/share/icons/hicolor/48x48/hildon/ $ mv ~/MyDocs/doombattscalable/* ~/.local/share/icons/hicolor/scalable/hildon/ instead? You shouldn't need to gain root as it's going into a user directory (for people unfamiliar with *nices, ~ is the user's home directory, in this case /home/user and .local is a hidden directory within it) and you don't need to backup as you're leaving the original files intact. Also using mv rather than cp avoids having extra copies of the files cluttering the filesystem up.
$ mv ~/MyDocs/doombatt48x48/* ~/.local/share/icons/hicolor/48x48/hildon/ $ mv ~/MyDocs/doombattscalable/* ~/.local/share/icons/hicolor/scalable/hildon/