Ah yes, the famous UNDO. Can you undo IT? Of course you can! The Linux keyboard shortcut Ctrl Z (PC) or command Z (Mac) will perform the Undo action. Undo is a global Linux keyboard shortcut that is usually located in the Edit menu. This keyboard shortcut for Undo is available in the Chrome OS / Chromium OS, Cinnamon, Gnome, KDE, LXDE, MATE, Unity (Ubuntu) and Xfce desktop environments. The same keyboard shortcut may also be available with other desktop environments that can be run on Linux.