I have discovered quite a number of keyboard shortcuts that are very useful, but seldom used by many. If you are looking for more keyboard shortcuts to add to your collection, I am sure you will be able to find some new tricks here.
1. Switch to the next/previous workspace
If you make use of the workspace very frequently, you can easily switch between different workspaces by pressing Ctrl + Alt + Left/Right Arrow. The Left key brings you to the previous workspace while the Right key brings you to the next adjacent. If you have enabled Compiz, you can even get it to show all the workspace by pressing Super + E on the keyboard.
By pressing Shift+ Ctrl + Alt + Left/Right Arrow, you can easily move your current window to another workspace in the specified direction. This keyboard shortcut works very well with the one mentioned above. If you have the habit of opening many applications/windows when doing your work, but don’t like to see your desktop and menubar cluttered with all the application windows, you can use this shortcut key to move your applications to another workspace and get your desktop organized.
3. Show the desktop
Ctrl + Alt + D enables you to quickly minimize all windows and give focus to the desktop. When all windows are minimized, this shortcut can also maximize all the windows to their previous state.
4. Keyboard shortcut for the mouse right-click
In most applications, you can always right-click on the mouse to access the options menu. On the keyboard, you can simply press Shift + F10 to achieve this ‘right-click‘ effect
5. Restart session and recover from crashes
There are very few instances where Ubuntu will crash totally. But if it does, you can press Ctrl + Alt + Backspace to restart the session, and 90% of the time, it will recover from the crashes.
6. Lock the screen quickly
If you need to leave your workstation for a while, you can quickly lock up your screen by pressing Ctrl + Alt + L and prevent unauthorized access by others.
7. Switch between windows in the reverse direction
Alt + Tab is a common shortcut key that allow you to switch between open windows. But do you know that by including the ‘Shift‘ button, you can reverse the windows switching direction? This is useful when you press Alt + Tab too fast and passed the window that you want to switch to. Simply press down the ‘Shift‘ button to go back to the previous window in the switch cycle.
8. Move windows with arrow keys
Press Alt+F7 to activate the Move window function and use any arrows key (up, down, left, right) to move the window around the screen.
9. Show hidden files
Most of the time, you won’t need to view the hidden files in your home folder, but in the event that you need to, you can press Ctrl + H inside the Nautilus (the file manager for Ubuntu) to show all hidden files.
10. Show file properties without right-clicking the mouse
The conventional way to view a file/folder properties is to right-click the mouse and select ‘Properties‘. Now you can just press Alt + Enter to get the Properties window to appear.
If you know more please share with me via comment.