For all aspiring kernel hackers, here is sample module which will create a file in /proc filesystem. The file when read by programs like "cat" displays the current process being executed by the kernel. The link contains source code for the module. If you don't know how to compile and test it, visit http://sa-swargam.blogspot.com/2009/08/how-to-test-sample-module-for-cre...

If you Enable process accounting in your system, it will help you to keep track of your user processes. It is very useful for System administrators for keeping log of your users.

cpulimit is a simple program that attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don't want them to eat too much cpu. It does not act on the nice value or other scheduling priority stuff, but on the real cpu usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.

/proc is a virtual filesystem generated at boot and updated regularly by the kernel. With /proc you can investigate exactly what hardware your Linux kernel sees, what processes it is running, boot options, and also manipulate kernel events.

This tutorial shows how you can limit the CPU usage of a process with the tool cpulimit on Debian/Ubuntu. cpulimit is a simple program that attempts to limit the CPU usage of a process (expressed in percentage, not in cpu time).

NetHogs is a lightweight Linux text-based tool that monitors bandwidth usage, then groups it by process, Network administrators can can see which PIDs are using the most bandwidth, and if necessary, you can kill the process.

cpulimit is a simple program that attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don't want them to eat too much cpu. It does not act on the nice value or other scheduling priority stuff, but on the real cpu usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.

The ext3 filesystem supports write barriers which are designed to allow a filesystem to take advantage of a disk’s write cache without fear of compromising the ingetrity of the filesystem on a power failure or kernel panic.

O'Reilly Media recently interviewed Greg about his claim that the Linux kernel now supports more devices than any other operating system ever has, as well as why binary-only drivers are illegal, and how the kernel development process works.