It may sound surprising that in computing, a field which develops so fast that the future often becomes the past without having been the present, there is nothing more stable and worthwhile learning than its foundations.

Random signals and noise are present in many engineering systems and networks. Signal processing techniques allow engineers to distinguish between useful signals in audio, video or communication equipment, and interference, which disturbs the desired signal.

In today’s IT environment, harried system administrators are finding themselves more overworked than ever. This book helps them regain some of the lost time spent creating and testing shell scripts, and guides readers through more than 150 much-needed and practical real-world examples.