Basic System Settings

Linux is a highly customizable operating system, and it provides a vast array of configuration options that allow users to tailor their systems to their specific needs. In this chapter, we will explore some of the basic system configuration settings in Linux and how they can be customized to improve system performance, security, and usability.

Before you make any changes to a configuration file, you should always make a backup. When making a copy, append a .bak extension to it so that you know it’s a copy meant for safekeeping.

Eventually, you are almost guaranteed to make a blunder when modifying these files. It is essential to have a backup of any configuration files before making any changes.

Due to the impossibility of covering every configuration file in Linux, we will focus on the most common configurations instead:

• The hosts configuration file
• The resolv configuration file
• The network-scripts configuration file
• The dhclient...