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In this first part of a two-part introduction to DNS troubleshooting, you'll learn how to dig in and find the problem.

From the stone age, we bring you fdisk: A still-useful tool for the modern sysadmin to be familiar with.

Ansible can do many things. This article demonstrates how to use Ansible to verify your configurations.

While there is nothing inherently wrong with Unix, it has gotten rather "long in the tooth," and there is a growing trend of migrating away from Unix to Linux. In this article, we look at the how and why of migrating from Unix to Linux.

The lowly du command has a lot to offer space-exploring sysadmins looking to understand their Linux system storage.

Discovering a system breach is scary and recovering one might be even scarier still. Here are the steps to recovery.

Address resolution protocol, aka ARP, is a communication protocol used in IPv4 networks. It was developed in 1982 and has been a staple in most networks since that time. Kick it old school with arp or join the cool kids with ip neigh. Same great info with two different tools.

Installing, patching, and removing software packages on Linux machines is one of the common tasks every sysadmin has to do. Here is how to get started with Linux package management in Linux Red Hat-based distributions (distros). Learn to manage software using YUM/DNF and RPM for your Red Hat-based Linux systems.

The only thing worse than virtual machine sprawl is dealing with virtual machine storage sprawl.

Remote work is challenging but here are five tips to keep your workflow in good shape.

This article explores some legitimate use cases for the sudo command.

Explore the tail and head commands as new additions to your sysadmin toolbox for manipulating and reading text.

Want to get started with Logical Volume Manager in Linux? Here's a short overview of the tools you'll need.

Or do they? This opinion piece from contributor David Both takes a look at when sudo makes sense, and when it does not.

If you still believe that Linux can't be infected by malware, think again and then install these three applications to detect and prevent problems.

You know that you're supposed to back up your data but what do you do with all the backups and archives you've created? Find out.

Using the find command to investigate common system administrator issues can help ease the troubleshooting process.

Firewall holes or exceptions can seem like secret sauce, but they're really a matter of just following the packets.

Need to monitor or administer a server remotely via the web? Look no further than Cockpit.

Creating logical volumes in Linux with LVM