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Thu, Feb 11, 2016 11:08 pm

Obtaining BIOS information on a Linux system with dmidecode

You can obtain information on the Basic Input/Output (BIOS) in a system running the Linux operating system, e.g., CentOS Linux, Ubuntu or another Linux distribution, using the dmidecode command. E.g., you can use dmidecode --type bios to obtain such information:

[root@localhost ~]# dmidecode --type bios
# dmidecode 2.12
SMBIOS 2.3 present.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
        Vendor: American Megatrends Inc.
        Version: 0601
        Release Date: 11/30/2006
        Address: 0xF0000
        Runtime Size: 64 kB
        ROM Size: 512 kB
        Characteristics:
                ISA is supported
                PCI is supported
                PNP is supported
                APM is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                ESCD support is available
                Boot from CD is supported
                Selectable boot is supported
                BIOS ROM is socketed
                EDD is supported
                5.25"/1.2 MB floppy services are supported (int 13h)
                3.5"/720 kB floppy services are supported (int 13h)
                3.5"/2.88 MB 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
                LS-120 boot is supported
                ATAPI Zip drive boot is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
        BIOS Revision: 8.10

Handle 0x002D, DMI type 13, 22 bytes
BIOS Language Information
        Language Description Format: Abbreviated
        Installable Languages: 1
                en|US|iso8859-1
        Currently Installed Language: en|US|iso8859-1

[root@localhost ~]#

Alternatively, you can use the --sring parameter and specify a particular option, such as BIOS vendor, as shown below:

[root@localhost ~]# dmidecode --string bios-vendor
American Megatrends Inc.
[root@localhost ~]# dmidecode --string bios-version
0601
[root@localhost ~]# dmidecode --string bios-release-date
11/30/2006

Note: you need to run the commands as root. On a Ubuntu system, you can run the commands by prefixing the commands with sudo, e.g., sudo dmidecode --type bios or sudo dmidecode --string bios-version, and provide your password when prompted. Otherwise you will get a "Permission denied" message.

Dmidecode is known to work on the following systems:

If it isn't available on your system, you can download the source code at dmidecode.

[/os/unix/commands] permanent link

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