Hello!
I am stop on step "Configure Grub for Lish Access" from linode tutorial. The solution with edit file /etc/default/grub:
GRUB_TIMEOUT=10
GRUB_CMDLINE_LINUX="console=ttyS0,19200n8"
GRUB_TERMINAL=serial
GRUB_DISABLE_LINUX_UUID=true
GRUB_SERIAL_COMMAND="serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1"
and "grub2-mkconfig -o /boot/grub2/grub.cfg" Is not worked((( How fix this?