Top 10 Linux security tutorials for sysadmins from 2021

Even as the world changes around us, the importance of IT security is one of the things that stands firm.

Posted: January 6, 2022 by Jörg Kastning (Sudoer)

Top 13 security articles of 2020 — Image by Free-Photos from Pixabay

Even in the midst of a global pandemic, there are still things that haven't changed—and probably will not change anytime soon. One is the importance of IT security for sysadmins and the companies these folks work for.

When you ask a new sysadmin, "What is IT security? And what tasks come with it?" you may get the following answer: "It's about keeping your applications, containers, and systems current by installing the latest available updates all the time." While this answer isn't wrong, there is so much more to explore, learn, and do in IT security.

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You can find many articles covering a variety of topics in IT security on Enable Sysadmin, including the top 10 security articles of 2021 listed below. Take a look, stay safe, and I wish you all the best in 2022.

How to set up SSH port forwarding on Linux hosts

How to set up SSH dynamic port forwarding on Linux

Dynamic port forwarding allows for a great deal of flexibility and secure remote connections. See how to configure and use this SSH feature.

Exploring the differences between su and sudo in Linux

Exploring the differences between sudo and su commands in Linux

If you're confused about what su and sudo commands do for you, this brief guide will help you sort them out.

6 OpenSSL command options every sysadmin should know

6 OpenSSL command options that every sysadmin should know

Look beyond generating certificate signing requests and see how OpenSSL commands can display practical information about certificates.

The 7 most used Linux namespaces

Check out this brief overview of what the seven most used Linux namespaces are.

Women with index finger over mouthing (ssshhhh)

Handling secrets in your Ansible playbooks

This article discusses how to manage secrets, such as passwords, in your Ansible playbooks. It explores the different ways that Ansible can fit into any workflow in a secure, easy to use manner.

An introduction to hashing and checksums in Linux

Always wondered how to make use of a checksum? This introduction shows you what they mean, and how to use the proper tools to verify the integrity of a file.

Managing Linux users with the passwd command

Linux authentication is primarily handled with passwords and public keys. Find out how the passwd command fits into the user management process.

Enumerating a new network with Nmap

Here are some basic Nmap flags that you can use to generate a quick and useful network map for effective troubleshooting and managing network traffic.

File encryption and decryption made easy with GPG

GPG is a popular Linux encrypting tool. Find out how to use its power to keep private files private.

How to manage Linux passwords with the pass command

The pass command empowers you to take full control of your password management tasks on Linux.

Topics: Security Year in review Linux administration

Jörg Kastning

Jörg has been a Sysadmin for over ten years now. His fields of operation include Virtualization (VMware), Linux System Administration and Automation (RHEL), Firewalling (Forcepoint), and Loadbalancing (F5). More about me

Top 10 Linux security tutorials for sysadmins from 2021

Jörg Kastning

Try Red Hat Enterprise Linux

Download it at no charge from the Red Hat Developer program.

Top 10 Linux security tutorials for sysadmins from 2021

Jörg Kastning

Try Red Hat Enterprise Linux

Download it at no charge from the Red Hat Developer program.

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