FYI, The "Super Key" mentioned here is the "Windows key" you find on most keyboards
Opens overview, from where, Running Applications, Application Search and workspace view can be accessed
Super
One of the most popular shortcuts, opens the terminal
CTRL + ALT +T
Locks the screen immediately. Sometimes Ctrl + Alt + L also does the same job
SUPER + L
SUPER + D
Minimizes all the applications to show the desktop, while a second press restores what was minimized
SUPER + A
Shows the Grid of installed applications, while an Esc key will move us out of this view
Switches between running applications by default from left to right. Want to reverse direction, just use Super + Shift + Tab
SUPER + Tab
Opens the Notification area, while Super + V also do the same job. Press one more, and the view will be hidden
SUPER + M
If you have multilingual setup, change your input source with this key combination
SUPER + Space
Closes the application window, while alt + F4 is more popular. Still, doesn't work for some native apps lime default Ubuntu Terminal
CTRL + Q
CTRL + ALT + Arrows
This combination, helps us to switch workspaces smoothly, saving a lot of time and improving productivity.
It brings logout prompt, where we can logout from the current Ubuntu Session
CTRL + Alt + Del
Alt + F2
This is for power users. If you want to run a quick command, instead of opening a terminal, you can use this combination to run the console
SUPER + Arrows
With Super pressed, the Window goes to left / right edge with left / right arrows. While, up arrow maximises the window, down arrow will restore it to usual state
There is no end to shortcuts. You can create your own shortcuts or alter the existing ones. Enjoy Ubuntu like a Pro :)