ARM: CentOS 7¶
Use the vi editor to open the /boot/efi/EFI/centos file, locate the line linux /vmlinuz-xxx.aarch64 root=/dev/mapper/cla-root ro crashkernel=auto rd.lvm.lv=cla/root rd.lvm.lv=cla/swap LANG=en_US.UTF-8, and add the following information to the end of the line:
consoleblank=600 console=tty0 console=ttyAMA0,115200
To allow user root to log in to the BMS using a serial port, check whether the /etc/securetty configuration file contains ttyAMA0. If not, add it.