Downloading Kernel Source

Fedora:
yum install yum-utils rpmdevtools
yumdownloader --source kernel
yum-builddep kernel-.src.rpm
rpm -ivh kernel-##.src.rpm
rpmbuild -bp --target=$(uname -m) /usr/src/redhat/rpmbuild/SPECS/kernel.spec

Ubuntu:
sudo apt-get install linux-source

Fix Missing GPG Key for Ubuntu 9.10

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5

Useful Commands

lshw - detail list of hardware