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How to secure a Kubernetes cluster by preventing unwanted modules from loading

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Looking to secure a Kubernetes cluster? One step you should take is unloading unnecessary kernel modules in your Linux containers. Learn how to stop modules from loading on your containers in a helpful tutorial.

Brittany Day
Apr 10, 2020

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5 Linux backup and restore tips from the trenches

Learn five helpful backup and restore tips for Linux from someone who's been there, failed, and then succeeded.

Brittany Day
Mar 30, 2020

Track Coronavirus Disease 2019 (COVID-19) Statistics From Commandline

Are you a Linux user trying to stay up-to-date on the Coronavirus pandemic? Learn how to track COVID-19 statistics from Commandline using Corona-cli, Coronavirus-tracker-cli and COVID-19 Tracker CLI in this helpful tutorial.

Brittany Day
Mar 27, 2020

How do you flush DNS cache on Linux? Read to find out!

One of the ways to solve connection issues is by clearing DNS cache. The Domain Name System works to resolve website names into their respective IP addresses.

Brittany Day
Mar 13, 2020

How to create a Linux user that cannot log in

For security reasons, you might need to create a Linux user without the ability to log in. Jack Wallen shows you how.

Brittany Day
Feb 28, 2020

Kali Linux explained: A pentester’s toolkit

Fast forward to that scene in a World War II movie where a grizzled, cigar-chomping sergeant removes the dusty tarp covering the Big Guns. That's approximately what it feels like to pick up Kali and start playing around with it.

Brittany Day
Feb 26, 2020

How to use Restricted Shell to limit user access to a Linux system

Learn how to prevent Linux users from executing certain commands and confining them to their home directory by employing rbash.

Brittany Day
Feb 21, 2020

Linux kernel hardening: Kernel parameters with sysctl

Linux kernel security can be increased at runtime using sysctl, allowing to mitigate potential vulnerabilities and exploits.

Brittany Day
Jan 13, 2020

How to use dnscrypt-proxy to secure DNS queries in Linux

This article describes how to install and configure dnscrypt-proxy to use DNSCrypt and DNS-over-HTTPS (DoH) with DNSSEC. Learn how to use dnscrypt-proxy to secure DNS queries in Linux:

Brittany Day
Jan 06, 2020

Secure Nginx with Let's Encrypt on CentOS 8

Let's Encrypt is a free, automated, and open certificate authority developed by the Internet Security Research Group (ISRG) that provides free SSL certificates. Learn how to install a free Let's Encrypt SSL certificate on CentOS 8 running Nginx as a web server and how to configure Nginx to use the SSL certificate and enable HTTP/2 in an informative tutorial:

Brittany Day
Dec 26, 2019

SSH Command

Secure Shell (SSH) is a cryptographic network protocol used for an encrypted connection between a client and a server. The ssh client creates a secure connection to the SSH server on a remote machine. The encrypted connection can be used to execute commands on the server, X11 tunneling, port forwarding, and more. Learn more about SSH command and its role in securely managing a remote server:

Brittany Day
Dec 25, 2019

How to test and validate DNSSEC using dig command line

How do I test and validate DNSSEC using thedig commandline under Linux, macOS, *BSD, and Unix-like systems? Learn how to test and validateDNSSEC using dig command line:

Brittany Day
Dec 20, 2019

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Securing an inherited Linux system

Learn how to secure an inherited Linux system you didn’t build but are suddenly responsible for:

Brittany Day
Dec 19, 2019

Bypassing Authentication on SSH Bastion Hosts

For any red teamer, SSH bastions (hosts that can control access between environments) can be difficult to compromise due to the use of multi-factor authentication (MFA) technologies. In a typical scenario, you may end up on a user’s host that has access to the bastion thanks to phishing or exploiting a vulnerability with the compromised user’s permissions. Learn more about SSH multiplexing and its role in bypassing authentication on SSH bastion hosts:

Brittany Day
Oct 25, 2019

5 tips for GNU Debugger

Learn how to use some of the lesser-known features of gdb to inspect and fix your code:

Brittany Day
Sep 27, 2019

How DevOps professionals can become security champions

Are you a DevOps professional? If so, are you aware that breaking down silos and becoming a champion for security will help you, your career, and your organization? Learn more:

Brittany Day
Sep 24, 2019

Introduction to the Linux chmod command

How much do you know about Chmod? Chmod, which sets read, write, and execute permissions, is one of the most important Linux security commands.

Brittany Day
Aug 28, 2019

Building a non-breaking breakpoint for Python debugging

Wondering how to speed up a debugger? Here are some tips to consider while building one for Python:

Brittany Day
Aug 13, 2019

Learn object-oriented programming with Python

In my previous article, I explained how to make Python modular by using functions, creating modules, or both. Functions are invaluable to avoid repeating code you intend to use several times, and modules ensure that you can use your code across different projects. But there's another component to modularity: the class.

Brittany Day
Jul 05, 2019

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Parse arguments with Python

If you're using Python for any amount of development, you have probably issued a command in a terminal, even if only to launch a Python script or install a Python module with pip.

Brittany Day
Jul 03, 2019

How to learn tips and tricks - Page 10.6

How To Strengthen Linux Security by Auditing with OpenSCAP

How To Check RDP Service in Linux Offered by XRDP

How to Install & Run Podman on Rocky Linux