【转帖】怎么查看操作系统是bios启动方式还是uefi启动方式？

环境

• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7

问题

• How to identify if the system is installed with UEFI or with Legacy only Boot?

决议

• Run the command below to find out if the system is BIOS boot or UEFI boot.

#[ -d /sys/firmware/efi ] && echo UEFI || echo BIOS

• For BIOS Boot, it will show as follows.

#[ -d /sys/firmware/efi ] && echo UEFI || echo BIOS
BIOS

• For UEFI boot, it will show

#[ -d /sys/firmware/efi ] && echo UEFI || echo BIOS
UEFI