1. 安装libsmbios软件包:
* 工具主页及文档: http://linux.dell.com/libsmbios/main/index.html

aptitude update
aptitude install libsmbios-bin

2. 查看当前BIOS版本及编号: 需要记住 System ID 及 BIOS Version 的值

hostname:/home/igi# getSystemId
Libsmbios:    2.0.3
System ID:    0x01B3
Service Tag:  XXXXXXX
Express Service Code: XXXXXXXXX
Product Name: PowerEdge 1950
BIOS Version: 2.2.6
Vendor:       Dell Inc.
Is Dell:      1

3. 下载对应BIOS的最新版本: http://linux.dell.com/repo/firmware/bios-hdrs/
* url格式: system_bios_ven_0x1028_dev_SYSTEM_ID_version_BIOS_VERSION
以 System ID为 0x01B3， BIOS Version为 2.2.6 为例
则需要找到: http://linux.dell.com/repo/firmware/bios-hdrs/ 下
对应的 system_bios_ven_0x1028_dev_0x01b3_version_x.x.x (x.x.x需要大于当前版本，如没有特别需求，使用最新版本即可)
对应的url为: http://linux.dell.com/repo/firmware/bios-hdrs/system_bios_ven_0x1028_dev_0x01b3_version_x.x.x/bios.hdr

wget http://linux.dell.com/repo/firmware/bios-hdrs/system_bios_ven_0x1028_dev_0x01b3_version_x.x.x/bios.hdr

4. 加载升级所需内核模块dell_rbu

modprobe dell_rbu
#确认模块已加载
lsmod | grep dell_rbu
dell_rbu                6800  0
firmware_class          7584  2 dell_rbu,bnx2

注意： 默认的debian内核已经有此模块，如果是其他内核，需要编译内核时做调整，推荐编译成模块

Firmware Drivers --->
<M> BIOS update support for DELL systems via sysfs

5. 升级BIOS

dellBiosUpdate -u -f bios.hdr

输出示例

dellBiosUpdate -u -f bios.hdr

WARNING: packet updates are not fully tested yet for packet modes v0/v2.
         We recommend that only monlithic updates be used at this point.
         You should only use packet mode on v0/v2 systems if you know what you are
         doing (for example, testing.)

Forcing MONOLITHIC mode...

Supported RBU type for this system: (MONOLITHIC, PACKET)
Using RBU v2 driver. Initializing Driver.
Setting RBU type in v2 driver to: MONOLITHIC (FORCED)
Prep driver for data load.
Writing RBU data (4096bytes/dot): .................................................
Notify driver data is finished.
Activate CMOS bit to notify BIOS that update is ready on next boot.
Update staged sucessfully. BIOS update will occur on next reboot.

6. 重启系统
7. 确认BIOS版本号

hostname:/home/igi# getSystemId
Libsmbios:    2.0.3
System ID:    0x01B3
Service Tag:  XXXXXXX
Express Service Code: XXXXXXXXXX
Product Name: PowerEdge 1950
BIOS Version: 2.7.0
Vendor:       Dell Inc.
Is Dell:      1