tl;dr
This post shows the list of default shortcuts for Ubuntu 16.04. You can directly check this via System Settings > Keyboard > Shortcuts on your machine.
Here is a notable issue: Even though your settings say that, for example, ctrl alt 0 does “minimize window”, ctrl alt KP0 will do the job instead. Note that the symbol KP0 refers to “Keypad number 0”.
System
ctrl alt l |
Lock screen |
ctrl alt del |
Log out |
Windows
alt tab |
move window |
alt ` |
move window within the same program |
ctrl super up |
maximize window |
ctrl super down |
restore window if it is maximized, minimize window otherwise |
ctrl alt KP5 |
toggle maximization state |
ctrl alt KP0 |
minimize window |
ctrl alt s |
toggle shaded state |
alt F4 |
close window |
alt F7 |
move window by moving a mouse pointer |
alt F8 |
resize window by moving a mouse pointer |
alt space |
activate the window menu |
Navigation
ctrl super d |
hide all normal windows and revert |
super home |
switch to workspace 1 |
ctrl alt left |
switch to workspace left |
ctrl alt right |
switch to workspace right |
ctrl alt up |
switch to workspace above |
ctrl alt down |
switch to workspace below |
shift super home |
move window to workspace 1 |
shift ctrl alt left |
move window to left workspace and switch to left workspace |
shift ctrl alt right |
move window to right workspace and switch to right workspace |
shift ctrl alt up |
move window to upper workspace and switch to upper workspace |
shift ctrl alt down |
move window to lower workspace and switch to lower workspace |
super s |
switch between workspaces |
Launchers
alt |
show the HUD (head up display) |
ctrl alt t |
launch terminal |
Typing
super space |
switch to next source |
shift super space |
switch to previous source |
Screenshots
print |
take screenshot |
alt print |
take screenshot of window |
shift print |
take screenshot of area |
ctrl print |
copy screenshot to clipboard |
ctrl alt print |
copy screenshot of window to clipboard |
shift ctrl print |
copy screenshot of area to clipboard |