linux administration

From all the compression methods available, Zip is probably one of the most popular ones. Released in 1989 by Philip Katz, Zip is widely used by system administrators in order…

As a network administrator, you are probably managing various Linux machines over different subnets of your company infrastructure. As network topology changes, you may need to change the IP address…

On Linux, knowing how to set and unset environment variables is essential to manage your hosts. Environment variables are a set of key value pairs stored on your Linux and…

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 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…

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…

This tutorial details access control lists on Linux, what they are used for and how to manage them. As a system administrator, you are probably spending quite some time configuring…

The source command on Linux is a pretty popular function run by system administrators daily. But what is the function of the source command? Used to refresh the current shell…