The Linux keyboard shortcut Ctrl Shift Z (PC) or command Shift Z (Mac) will perform the Redo action in Cinnamon, Gnome, KDE, LXDE, MATE, Unity (Ubuntu) and Xfce. To perform Redo in Chrome OS / Chromium OS, use Ctrl Y (PC) or command Y (Mac). Also, be aware that certain applications may opt to use that alternative instead of the standard keyboard shortcut. Redo is a global Linux keyboard shortcut that is usually located in the Edit menu. The same keyboard shortcut may also be available with other desktop environments that can be run on Linux.