General keyboard shortcuts
Ctrl + A = Select all
Ctrl + C = Copy the highlighted content to clipboard
Ctrl + V = Paste the clipboard content
Ctrl + N = New (Create a new document or new application, not in terminal)
Ctrl + O = Open a document
Ctrl + S = Save the current document
Ctrl + P = Print the current document
Ctrl + W = Close the current document
Ctrl + Q = Quit the current application

Keyboard shortcuts for GNOME desktop
Ctrl + Alt + Delete = Log out
Super + L = Lock the screen
Super + A = Show all applications
Super + V = Show the notification list
Super + S = Show the overview
Ctrl + Alt + F1 = Switch to the first virtual terminal
Ctrl + Alt + F2(F3)(F4)(F5)(F6) = Select the different virtual terminals
Ctrl + Alt + F7 = Restore back to the current terminal session with X
Ctrl + Alt + Backspace = Restart GNOME
Alt + Tab = Switch between open programs
Ctrl + Alt + Tab = Switch between system controls
Ctrl + Alt + Escape = Switch system controls directly
Alt + F1 = Open the Activities overview
Alt + F2 = Open the "Run Command" dialog box.
Alt + F4 = Close the current window
Alt + F5 = Unmaximizes the current window
Alt + F7 = Move the current window
Alt + F8 = Resize the current window
Alt + F10 = Maximize the current window
Alt + Space = Opens the window menu
Ctrl + Super + D = Hide all windows/Show desktop
Super + PageUp = Move to the above workspace
Super + PageDown = Move to the below workspace
Super + End = Move to the last workspace
Super + Home = Move to the first workspace
Shift + Super + Up/Down/Left/Right = Move window one monitor up/down/left/right
Shift + Super + PageUp/PageDown = Move window one workspace up/down
Shift + Super + End = Move window to last workspace
Shift + Super + Home = Move window to first workspace

Keyboard shortcuts for Terminal
Ctrl + A = Move cursor to beginning of line
Ctrl + E = Move cursor to end of line
Ctrl + C = Kill the current process
Ctrl + Z = Suspend the current process by sending the signal SIGSTOP
Ctrl + R = Find the last command matching the entered letters
Enter a letter, followed by Tab + Tab = List the available commands beginning with those letters
Ctrl + U = Delete the current line
Ctrl + K = Delete the command from the cursor right
Ctrl + W = Delete the word before the cursor
Ctrl + L = Clears the terminal output
Shift + Ctrl + C = Copy the highlighted command to the clipboard
Shift + Ctrl + V (or Shift + Insert) = Paste the contents of the clipboard
Alt + F = Move forward one word
Alt + B = Move backward one word
Arrow Up/Down = Browse command history
Shift + PageUp / PageDown = Scroll terminal output

Keyboard shortcuts for Taking Screenshots
Print = Save a screenshot to Pictures folder
Alt + Print = Save a screenshot of a window to Pictures folder
Shift + Print = Save a screenshot of an area to Pictures folder
Ctrl + Alt + Print = Copy a screenshot of a window to clipboard
Shift + Ctrl + Print = Copy a screenshot of an area to clipboard
Ctrl + Print = Copy a screenshot to clipboard
Shift + Ctrl + Alt + R = Start screencast recording

Keyboard shortcut for Files/Nautilus
Ctrl + ?/F1 = Open the Keyboard Shortcut window
Shift + Ctrl + N = Create New Folder
Delete = Move selected files/folders to Trash
Shift + Delete = Delete selected files/folders permanently
Ctrl + T = Open a new tab
Ctrl + PageUp = Go to previous tab
Ctrl + PageDown = Go to next tab
Shift + Ctrl + PageUp = Move tab left
Shift + Ctrl + PageDown = Move tab right
Shift + Ctrl + T = Restore closed tab
Alt + 0 . . . . 8 = Go to the specified tab
Ctrl + ENTER = Open the selected folder in a new tab
Shift + ENTER = Open the selected folder in a new window
Alt + ENTER = Show File/Folder Properties
Ctrl + 1 = Toggle View As List
Ctrl + 2 = Toggle View As Grid
Ctrl + S = Select Pattern
F2 = Rename File
Ctrl + A = Select all files and folders
Ctrl + F = Search
Ctrl + D = Bookmark current location
Ctrl + W = Close Window
Ctrl + o or Enter = Open selected file/folder
Ctrl + R = Reload Window
Alt + Up = Open parent directory
Alt + Left = Back
Alt + Right = Forward
Alt + Home = Go to Home folder
Ctrl + L = Show/go to location bar
/ = Show/go to location bar with root location
~ = Show/go to location bar with Home location
Ctrl + H = Show Hidden Files
Ctrl + + = Zoom In
Ctrl + - = Zoom Out
Ctrl + 0 = Normal Size
Shift + Ctrl + Down = Open selected file and close window
Alt + Down = Open selected file with default application
F9 = Show/hide sidepane
F10 = Show/hide action menu

For those who want to configure your own keyboard shortcuts, you can do so at “Settings -> Devices -> Keyboard.”