Introduction

An operating system consists of a collection of system software that is designed for different purposes. It is a good idea to monitor each of these programs in order to know whether they are working properly or not. We will also use a technique called logging by which we can get important information in a file while the program is running. The content of this file can be used to understand the timeline of operations that are taking place in a running program or daemon. For instance, if an application or a service crashes, this information helps to debug the issue and enables us to fix any issues.

This chapter deals with different commands that can be used to monitor different activities. It also goes through logging techniques and their usages.