In this chapter, you learned that log files, configuration files, and the /proc filesystem are key sources of information during troubleshooting. We also covered the basic use of many fundamental troubleshooting commands.
While reading this chapter, you might have noticed that quite a few commands are also used in day-to-day life for non-troubleshooting purposes. If we look back at the troubleshooting process from Chapter 1, Troubleshooting Best Practices, the first step included information gathering.
While these commands might not explain the issue themselves, they can help gather information about the issue, which leads to a more accurate and quick resolution. Familiarity with these fundamental commands is critical to your success during troubleshooting.
In the next few chapters, we will use these fundamental commands to troubleshoot real-world scenarios. The next chapter focuses on troubleshooting issues with a web-based application.