In a day to day system administrative tasks, you may need to find out BIOS version of your servers. In Linux, you can find out the BIOS version without rebooting the server. dmidecodecommand can be used to achieve this.
Command : dmidecode –type 0
[root@testsrv1 ~]# dmidecode –type 0
# dmidecode 2.7
SMBIOS 2.5 present.
Handle 0x0000, DMI type 0, 20 bytes.
Vendor: innotek GmbH
Release Date: 12/01/2006
Runtime Size: 128 kB
ROM Size: 128 kB
ISA is supported
PCI is supported
Boot from CD is supported
Selectable boot is supported
8042 keyboard services are supported (int 9h)
CGA/mono video services are supported (int 10h)
ACPI is supported
In some of the Linux servers, depending upon Hardware model, “–type 0” wont give correct output. In that cases, just use “dmidecode | more” command and find out the information by manually looking out the output.