System & Network Admin

Community driven roadmaps, articles, guides, quizzes, tips and resources for developers to learn from, identify their career paths, know what they don't know, find out the knowledge gaps, learn and improve.

Today we are going to quickly cover the Linux return code and its use in the world of network automation. What is a Return Code? A return code (also known as an exit code) is: a numeric value that is returned by a process (to its parent process) when terminating

If you're tired of reaching for your smartphone authenticator or key fob to type in a TOTP, or Time-Based One-Time Password, then why not use Emacs to generate them for you instead? Combine it with auth sources and GPG, and you can securely encrypt the master keys at the same time.

A list of third party modules for NGINX.

Learn how email encryption can secure your inbox from hackers and protect you from phishing, doxxing, malware, and more.

ModSecurity is a free and open-source Web Application Firewall (WAF) that protects your website from several types of attacks, including cross-site sc...

Today we have a guest editorial from Andy Warren. Should we adopt a duress password, just in case we find ourselves in a movie situation while at work?

我看见你了，所以我收录你。I see you (ICU), so I digest you. https://digest.icu

Users often store a lot of sensitive information on their computers—from credentials to banned texts to family photos—that they might normally expect to be protected by the login password of their account. Under some circumstances, though, users can be required to log into their system so that some third party (e.g. government agent) can examine and potentially copy said data. A new project, PAM Duress, provides a way to add other passwords to an account, each with its own behavior, which might be a way to avoid granting full access to the system, though the legality is in question.

Impressive distro is somewhere between a tech demo and a power user's tool

This article gives a breakdown of the Linux File System/directory structure, some of the critical files, their usability, and their location.

Monica CRM is a free and open-source CRM (Customer Relationship Manager) written in PHP. Monica CRM helps you track personal events, activities, work ...

This guide explains how to list installed packages and how to remove all packages installed on a certain date and time in Linux.

Here's how to download all of Wikipedia (6M+ articles) onto a USB flash drive for offline access. After hours of trying and failing, here's what worked for me

26 votes and 28 comments so far on Reddit

Developing with Elixir requires a fair amount of configuration.

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In a previous article, I explained how to set up Nix on MacOS. This article shows the way I set up a development environment for an Elixir project with Nix. The instructions in this article assume that you have a working Nix installation on your machine.

Jack Wallen shows how you can create a Linux shell script that requires a password without having to save a password within the script.

In this guide, we will discuss the best tools for monitoring and debugging disk I/O activity (performance) on Linux servers.

mStream is a free, open-source, and cross-platform music streaming server that lets you sync and stream music from your home computer to any device, anywhere.

Computer clocks are not perfect and often slow down over time. Learn how you can sync your Linux time online with NTP servers and keep it on time.

While RGB lighting tools usually only support Windows, some independent developers have created Linux apps to help control RGB lighting.

Dockerfiles are a critical part of working with containers; they allow us to create images from a Dockerfile and customize them to fit our usage needs because Dockerfiles work by using directives and parameters for configurations. One of the common directives in a Dockerfile is the ENTRYPOINT directive. What does Docker Entrypoint do is explained in this article.

Guide to Docker ENTRYPOINT. Here we also discuss how entrypoint works in docker? along with different examples and its code implementation.