Dell Warranty check

[christian.peper at kpn.com]

Jens Heinz reported on using dmidecode to fetch the service tag of a
Dell server.

I fine tuned the command a bit more and the result is a oneliner to get
the tagid of a Dell server:
dmidecode | grep -A 6 0x0100 | grep Serial
You need to be root or use sudo...

0x0100 is the DMI record that holds the tagid. 
-A 6 prints the 6 lines following the header
grep retrieves the actual service tag

Hope it helps someone!
Chris