How do I find out BIOS version using a Linux command line option?
To find out BIOS version under Linux operating systems use the dmidecode command which is a tool to analyse BIOS data. You must login as root to run dmidecode command:
dmidecode | less
dmidecode 2.10 SMBIOS 2.5 present. 45 structures occupying 1832 bytes. Table at 0xCFF6A000. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Phoenix Technologies LTD Version: 2.1 Release Date: 06/23/2008 Address: 0xE4F00 Runtime Size: 110848 bytes ROM Size: 1024 kB Characteristics: PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed ESCD support is available Boot from CD is supported Selectable boot is supported EDD is supported 3.5"/2.88 MB floppy services are supported (int 13h) ACPI is supported USB legacy is supported LS-120 boot is supported ATAPI Zip drive boot is supported BIOS boot specification is supported Targeted content distribution is supported
Another output from my laptop:
sudo dmidecode | less
BIOS Information Vendor: Dell Inc. Version: A02 Release Date: 02/03/2010 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 2112 kB Characteristics: ISA is supported PCI is supported PC Card (PCMCIA) is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported 3.5"/720 KB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported AGP is supported Smart battery is supported BIOS boot specification is supported Function key-initiated network boot is supported Targeted content distribution is supported BIOS Revision: 0.2 Firmware Revision: 0.2 Handle 0x0100, DMI type 1, 27 bytes System Information Manufacturer: Dell Inc. Product Name: Precision M6500 Version: Not Specified Serial Number: 55Lxxxx UUID: 4a2yzzzeC-3500-xxx-yyy-Bzzzzyyy5y Wake-up Type: Power Switch SKU Number: Not Specified Family: