Linux System Administration

This tutorial focuses on the techniques to set the date and time on Linux using timedatectl, NTP or date. As a system administrator, you may be asked to set the…

On Linux, there are many ways to change the current user for the session. If you are not using a graphical interface, you might wonder how you can change the…

This tutorial focuses on user administration on Linux hosts, managing users and groups. As a system administrator, you are manipulating users and groups all the time. You may be required…

The screen command is a very common command used on Linux to launch and arrange multiple terminal shells within one single shell. Screen is most of the time used for…

This tutorial focuses on the best Linux books that you should read to become a professional system administrator. First released in September 1991, the Linux kernel was designed with home…

This is the set of exercises following the article on Linux Processes Explained. If you carefully read the article and understood the principles detailed inside, you should be able to…

As a Linux system administrator, there are many different ways to transfer files, securely or not, between two different hosts. During your day job, you may be asked to perform…

This tutorial gives details about what processes are, how they are used and how they can be managed on Linux. As a system administrator, you have probably interacted with processes…

On Ubuntu and Debian hosts, the single user mode, also referred as the rescue mode, is used to perform critical operations. The single-user mode can be used to reset the…

This tutorial focuses on setting up and configuring a SSH server on a Debian 10 minimal server SSH, for Secure Shell, is a network protocol that is used in order…