You downloaded Windows executable BIOS update file bios.exe
. How to update the BIOS under Linux?
1. Download FreeDOS archive of bootable image
$ wget https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/FD12FULL.zip
2. Extract the archive
$ unzip FD12FULL.zip
3. Write the image to USB stick
Determine which of /dev/sdX
is your USB stick
# fdisk -l
In my case the USB stick is device /dev/sdb
Write the image directly to the device
# dd if=FD12FULL.img of=/dev/sdb status=progress
4. Mount USB stick
5. Copy bios.exe
to USB stick
$ cp bios.exe /media/user-name/FD-SETUP/
6. Unmount USB stick and reboot
7. In the FreeDOS live installation environment you will be prompted to install FreeDOS, select "No - Return to DOS"
8. Run bios.exe
The status of update process is displayed on the screen. PC is rebooted automatically at the end of upgrade.