Serial console

• Serial and systemd
• https://help.ubuntu.com/community/SerialConsoleHowto

Enabling serial console

In /etc/default/grub append:

GRUB_CMDLINE_LINUX="..... console=ttyS0,115200"

and then

On Debioids

update-grub

On CentOS

grub2-mkconfig -o /boot/grub2/grub.cfg