Editing Forward X11 ssh su

• Get from default user the X11 cookie

xauth list $DISPLAY

• Get default DISPLAY

echo $DISPLAY

• Change to root user (or a different one)

sudo su -l

• Add X11 cookie to user (This cookie might change)

xauth add $(sudo -u youruser -H xauth list $DISPLAY)
export DISPLAY=$(sudo -u youruser -H echo $DISPLAY)