Redirect grub output to the serial port

Redirect grub output to the serial port

Edit/boot/GRUB/grub. conf and add the following line. Bit Rate 115200 data bit 8-bit no-parity bit stop bit is 1

Serial -- unit = 0 -- speed = 115200 -- word = 8 -- parity = No -- stop = 1

Terminal -- timeout = 5 console serial

During GRUB boot, the output is sent to the terminal screen and serial port at the same time. during the grub boot process, press any key to continue on the terminal and the Super Terminal connected to the serial port. The prompt is displayed once every second, 5 times in total. You can modify the menu. -- timeout = 10 in the terminal line of the LST file changes the number of prompts. During this period, you can press any key on the terminal keyboard or the super terminal connected to the serial port to enter the grub selection menu. if you do not press any key on the terminal or the super terminal connected to the serial port within five seconds, the grub selection menu appears on the console. if you want, grub can be modified if the GRUB menu appears on the serial port. conf
Modify serial to serial console.