This article will describe changing GRUB2 and Linux to serial console.
Table of Contents
1 /etc/default/grub
Change /etc/default/grub as below.
- Change GRUB terminal to console and serial. This will provide one GRUB to a monitor display and serial console.
- Change linux kernel console to tty1 and ttyS0.
cat <<EOF | sudo tee /etc/default/grub GRUB_DEFAULT=0 GRUB_TIMEOUT=1 GRUB_DISTRIBUTOR="Arch" GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="console=tty1 console=ttyS0,115200" GRUB_PRELOAD_MODULES="part_gpt part_msdos" GRUB_TERMINAL="console serial" GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1" GRUB_DISABLE_LINUX_UUID=true GRUB_DISABLE_RECOVERY=true EOF
2 grub-mkconfig
Update /boot/grub/grub.cfg with grub-mkconfig.
$ sudo grub-mkconfig -o /boot/grub/grub.cfg Generating grub configuration file ... Found linux image: /boot/vmlinuz-linux Found initrd image: /boot/initramfs-linux.img Found fallback initramfs image: /boot/initramfs-linux-fallback.img done
Reboot ArchLinux.
$ sudo reboot
3 Execution result
GRUB to monitor display is as below.
GRUB to serial console is as below. This article used "sudo virsh console <vmname>" for connecting serial console.
Login prompt to display is as below.
Login prompt to serial console is as below.
