However, there are a few utilities, that allow you to upgrade your system BIOS under Linux.
Warning: Flashing motherboard BIOS is a dangerous activity that can render your motherboard inoperable!
This image is a full disk image, including partitions, so adding your flash utility will be a little trickier: First find the first partition (at time of writing, the first partition starts at block 63; this means that the partitions starts at offset thus leaving more space for the flash utility and new BIOS image. Copy your BIOS flash utility and new BIOS image to the mounted floppy disk image.For example: Finally reboot your machine, making sure the CD drive is first in the boot sequence, and run the BIOS upgrade procedure when the CD boots.If using the GRUB method, choose the new entry on the list, and it should boot into Free DOS. It has worked on Lenovo laptops like X220, X230, X260, W540, T450 and T450s. Flashrom is a utility for identifying, reading, writing, verifying and erasing flash chips.It is designed to flash BIOS/EFI/coreboot/firmware/option ROM images on mainboards, network/graphics/storage controller cards, and various programmer devices.