"We recently highlighted some of the new features of the Linux 2.6 kernel. Now, we'll look at the process of compiling and installing a new kernel safely, without overwriting the existing kernel.
"You can install as many kernels as you like on a Linux system, and select the one you want to run at boot time. This makes it easy to test different kernels, and different kernel configurations, with particular sets of hardware or applications. The wise network admin always tests new kernels before running them on production machines..."