System & Network Admin

Use these command-line switches in your terminal and shell scripts to boost your productivity

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World's simplest collection of useful browser-based list processing utilities. Reverse lists, join lists, randomize lists, change list item separator, and more.

In a for loop like this one: for f in `ls *.avi`; do echo $f; ffmpeg -i $f $f.mp3; done $f will be the complete filename, including the extension. For example, for song1.avi the output of the com...

In this tutorial, we show various methods to check if a directory exists via a Bash script or on the command line in Linux.

This tutorial will walk you through the basics of the Bash if, if..else, if..elif..else and nested if statements statements and show you how to use them in your shell scripts.

Smokeping is one great tool that can help you deal with the complexity. In this article, we’ll learn how to use Smokeping to identify and fix network

SpaceX bought satellite data start-up Swarm, in a rare acquisition by Elon Musk’s space company over a year ago. SpaceX is now advertising Swarm satellite Internet of Things connectivity on its Sta…

Point and laugh at me as I administer my systems without copy and pasting monstrous one-liners from StackOverflow and Reddit? Po

nohup is a supplemental command that tells the Linux system not to stop a command once it has started. Learn what is nohup and how to use it.

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