SysAdmin

Python 3.9, the latest point release at the time of writing this article, comes with features such as improved time zone support, dictionary updates, and more flexible decorators. Follow this tutorial to upgrade to Python 3.9.

Follow this simple tutorial to learn three different ways to list all databases in PostgreSQL.

The hosts file is a local implementation of the Domain Name System (DNS). It allows users to map IP addresses to local and public domain names, instructing the system on how to resolve host queries. This article teaches you how to edit the hosts file on Mac.

Learn about the git switch and git checkout commands, when to use them, their options and pros and cons.

Learn how to use the Linux ifup command to bring a network interface up.
This text explains the Linux ifup command, its options, and common usage examples.

Linux ifdown command configures network interfaces based on their definitions in the file /etc/network/interfaces.
The following text explains the Linux ifdown command and some practical examples.

There are several ways to rename files in Linux, including using the GUI and terminal commands. This tutorial shows you how to rename files using the mv and rename commands.

An IP address is a code assigned to a computer on a network. It works as a postal address, ensuring that network traffic is sent to the correct computer. In most cases, your system will have two different IP addresses: an internal IP address and an external IP address. Learn how to find both either by using a GUI or through a command line.

This article compares YUM and DNF, two package managers in RHEL-based Linux distros, helping you choose the right one for your system.

Tutorial on securely transferring files between Unix or Linux systems using the SCP command. The SCP or Secure Copy command is a method of encrypting the transmission of files between two computer systems.