The Linux keyboard shortcut Ctrl W (PC) or control W (Mac) will perform the Close Tab action. If you are using an application that supports tabs, the keyboard shortcut will close the current tab. If there is only one tab open or if the application in use does not support tabs, the keyboard shortcut may close the entire window. Close Tab is a global Linux keyboard shortcut that is usually located in the File menu. This keyboard shortcut for Close Tab 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.