User's Manual

Using Dell Update Packages 29
4 Start to verify the signature of the packages by first downloading the
following two files from
support.dell.com :
• PE2850-BIOS-LX-A20.bin.sign
• PE2850-BIOS-LX-A20.bin
5 Import the public key by running the following command line:
gpg --import <linux-security-publickey.txt>
The following output message appears:
gpg: key 23B66A9D: "Dell Computer Corporation
(Linux Systems Group) <[e-mail]>"
not changed
gpg: Total number processed: 1
gpg: unchanged: 1
6
Verify the public key by typing the following command:
gpg --edit-key 23B66A9D
Then at the command prompt, type the following commands:
fpr
sig n
7 Verify the PE2850 BIOS package digital signature by running the following
command:
gpg --verify PE2850-BIOS-LX-A02.bin.sign PE2850-
BIOS-LX-A02.bin
The following output message appears:
gpg: Signature made Thu 14 Apr 2005 04:25:37 AM
IST using DSA key ID 23B66A9D
gpg: Good signature from "Dell Computer
Corporation (Linux Systems Group) <linux-
[e-mail]>"
8
Copy the files that you downloaded to a directory where you want to store
all the packages for the Dell system, for example, to the
/home/updates/2850/bin directory.