Grub

Serial

To enable serial output, edit /etc/default/grub with the following lines:

GRUB_TERMINAL_OUTPUT="console serial"
GRUB_CMDLINE_LINUX="rhgb console=ttyS0,115200n8 "
GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200"

Then update the grub config:

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

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