Locate Dell Service Tag

Linux Platform

yum -y install dmidecode

dmidecode -s system-serial-number

Script

#!/bin/bash

model=$(dmidecode -s system-product-name)
tag=$(dmidecode -s system-serial-number)
bios=$(dmidecode -s bios-version)
cpu=$(dmidecode -s  processor-version)
hn=$(hostname)


echo
echo '================================='
echo -e ' ' $model
echo '================================='
echo -e '   Hostname :' $hn
echo -e 'Service Tag :' $tag
echo -e '       BIOS :' $bios
echo -e '        CPU :' $cpu
echo
echo

Windows Platform

From a Command Prompt

wmic bios get serialnumber