Is this for Latitude 5480?
Kindly review this link on how to update BIOS for Linux based machines.
Also, please click my DELL-username and write me a private message with the service tag and your Name for case records.
Let us know if you have any other queries.
Yes i've already red this article, but i did not notice this sentence "the BIOS will end in an .EXE extension. Even though Linux can’t open it natively, it will be processed by the BIOS properly", so now i can manage the bios update with pendrive! Thanks for the help!!