In Ubuntu 18.04, remmina cannot "grab all keyboard events" anymore
As a workaround, you can disable Wayland. Edit /etc/gdm3/
Generating a bootable USB flash drive for Linux distribution
Linux Insert the USB flash drive into a USB port on your computer. Run the terminal (console) in the super-user mode (e.g. using commands su or sudo -s — depending on your Linux distribution). Use the command fdisk -l to detect the USB flash drive name (e.g. /dev/sdb ). Save the drive image to the USB flash drive using this command: dd if=kerio-control-installer.iso of=/dev/sdx bs=1M and replace kerio-control-installer.iso with the real file name and /dev/sdx with the actual device name. It is necessary to enter the physical device (e.g. /dev/sdx ), not only a partition (e.g. /dev/sdx1 ). Use command sync to guarantee finishing all drive operations. Eject the USB drive safely and remove it from the USB port.