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AlmaLinux 9 provides two mechanisms for sharing files and folders with other systems on a network. One approach is to use a technology called Samba. Samba is based on Microsoft Windows Folder Sharing and allows Linux systems to make folders accessible to Windows systems and access Windows-based folder shares from Linux. This approach can also…

In the previous chapter, we looked at how to display the entire AlmaLinux 9 desktop on a remote computer. While this works well if you need to display the entire desktop remotely, it could be considered overkill if you only want to display a single application. Therefore, this chapter will look at displaying individual applications…

AlmaLinux 9 can be configured to provide remote access to the graphical desktop environment over a network or internet connection. Although not enabled by default, displaying and accessing an AlmaLinux 9 desktop from a system anywhere else on a network or the internet is relatively straightforward. This can be achieved regardless of whether that system…

When an AlmaLinux 9 system is first installed, it is configured by default to allow remote command-line access via Secure Shell (SSH) connections. SSH provides password-protected and encrypted access to the system for the root account and any other users added during the installation phase. However, this level of security is inadequate and should be…

A firewall is vital in protecting a computer system or network of computers from external attacks (typically from an external source via an internet connection). For example, any computer connected directly to an internet connection must run a firewall to protect against malicious activity. Similarly, any internal network must have some form of firewall between…

A firewall is a vital component in protecting an individual computer system or network of computers from external attacks (typically from an internet connection). Any computer connected directly to an internet connection should ideally run a firewall to protect against malicious activity. Similarly, any internal network must have some form of firewall between it and…

It is difficult to envisage an AlmaLinux 9 system that does not have at least one network connection, and harder still to imagine how such an isolated system could be of much practical use. The simple fact is that AlmaLinux 9 is designed to provide enterprise-level services over network and internet connections. Therefore, a crucial…

To gain proficiency in AlmaLinux 9 system administration, it is essential to understand the concepts of systemd units with a particular emphasis on two specific types known as targets and services. This chapter provides a basic overview of the different systemd units supported by AlmaLinux 9 and how to configure the many services that run…

It is doubtful that a newly installed AlmaLinux 9 system will contain all the software packages to perform the tasks for which it is intended. Even once all the required software has been installed, it is almost certain that newer versions of many of those packages will be released during the system’s lifespan. In some…

During the installation of AlmaLinux 9, the installer created a root or superuser account and required that a password be configured. The installer also provided the opportunity to create a user account for the system. We should remember that AlmaLinux 9 is an enterprise-class, multiuser, and multi-tasking operating system. To use the full power of…