Ubuntu: Howto change Screen Resolution via CLI

You can change screen resolution size via CLI , use following cmd:

xrandr
(It will show you current screen resolution and available modes.
Now you can change the size by issuing this cmd:

xrandr --output VGA-0 --mode 1024x768

(change the VGA-0 according to what xrandr shows vga syntax for your card, in my example it shows VGA-0)