Category: RHEL

An essential part of running and administering an RHEL 9 system involves monitoring the overall system health regarding memory, swap, storage, and processor usage. This includes knowing how to inspect and manage the system and user processes running in the background. This chapter will outline some tools and utilities that can be used to monitor…

An essential part of maintaining the performance of a RHEL 9 system involves ensuring that adequate swap space is available comparable to the memory demands placed on the system. Therefore, this chapter provides an overview of swap management on RHEL 9. What is Swap Space? Computer systems have a finite amount of physical memory available…

In the previous chapter, we looked at adding a new disk drive to a RHEL 9 system, creating a partition and file system, and then mounting that file system to access the disk. An alternative to creating fixed partitions and file systems is to use Logical Volume Management (LVM) to create logical disks comprising space…

One of the first problems users and system administrators encounter is that systems need more disk space to store data. Fortunately, disk space is now one of the cheapest IT commodities. In this and the next chapter, we will look at the steps necessary to configure RHEL 9 to use the space provided by installing…

Along with acting as a web server, email is one of the primary uses of a RHEL 9 system, particularly in business environments. Given the importance and popularity of email, it is surprising to some people to find out how complex the email structure is on a Linux system. This complexity can often be overwhelming…

The Apache web server is among the many packages that make up the RHEL 9 operating system. The scalability and resilience of RHEL 9 make it an ideal platform for hosting even the most heavily trafficked websites. This chapter will explain how to configure a RHEL 9 system using Apache to act as a web…

Now that the basics of Linux Containers have been covered in the previous chapter, this chapter will demonstrate how to create and manage containers using the Podman, Skopeo, and Buildah tools on RHEL 9. By the end of this chapter, you will have a clearer understanding of how to create and manage containers on RHEL…

The preceding chapters covered the concept of virtualization, emphasizing creating and managing virtual machines using KVM. This chapter will introduce a related technology in the form of Linux Containers. While there are some similarities between virtual machines and containers, key differences will be outlined in this chapter, along with an introduction to the concepts and…

In previous chapters, we have covered the installation and configuration of KVM-based guest operating systems on RHEL 9. This chapter explores additional areas of the virsh tool that have not been covered in previous chapters and how it may be used to manage KVM-based guest operating systems from the command line. The virsh Shell and…

By default, the KVM virtualization environment on RHEL 9 creates a virtual network to which virtual machines may connect. It is also possible to configure a direct connection using a MacVTap driver. However, as outlined in the chapter entitled An Overview of RHEL 9 Virtualization Techniques, this approach does not allow the host and guest…