One more issue worth mentioning here is the subject of the kernel supplied on the Ubuntu installation CD for the i386 architecture. It seems that many people installing Ubuntu Linux on a modern computer do not realise that they might be running their operating system with a seriously underpowered kernel. That's because the Ubuntu installation CD contains only one kernel, which quite naturally is the one that will work on all x86 architectures. However, if you are using a modern processor, such as Intel Pentium or the AMD processors, you will get a much better performance if you download and install one of the kernels specially compiled for those processors. Just run “apt-get install linux-image-686″ if your system is powered by at least an Intel Pentium II processor or “apt-get install linux-image-k7″ on systems with the AMD K7 processor. You can check your current kernel version with the “uname -r” command.