Linux System Administration

This tutorial focuses on adding sudoers rights to a user on Ubuntu 20.04 Focal Fossa. When managing an Ubuntu 20.04 server, it is actually quite important to know how to…

As a network administrator, you are probably already very familiar with the ARP protocol. ARP is commonly used by layer two devices in order to discover as well as communicating…

Copying directories on Linux is a big part of every system administrator routine. If you have been working with Linux for quite some time, you know how important it is…

If you are working on a small to medium entreprise network, you probably have dozens of drives and printers that need to be shared. Besides the NFS protocol, there are…

As a system administrator, you are probably monitoring the disk space on your system all the time. When browsing directories on your server, you might have come across directories with…

When working with Bash and shell scripting, you might need to use conditions in your script. In programming, conditions are crucial : they are used to assert whether some conditions…

As a system administrator, you probably know how important environment variables are in Bash. Environment variables are used to define variables that will have an impact on how programs will…

Chown is a command on Linux that is used in order to change the owner of a set of files or directories. Chown comes with multiple options and it is…

Pinging ports is one of the most effective troubleshooting technique in order to see if a service is alive or not. Used by system administrators on a daily basis, the…

As a network administrator, you probably know how costly routers can be. If you are configuring a complex network architecture, you might need Cisco or Netgear routers, as they embed…