System & Network Admin

Installing and updating the OS, managing user accounts, and looking after security are just a few of the primary responsibilities of a Linux systems administrator.

This article explores FFmpeg's capabilities for converting video, audio, and image files with practical examples in Linux.

To help reduce the load on my Postfix mail servers, I rely on Postscreen (which is built in to Postfix) to help weed out bot spam and misconfigured

stress and stress-ng are essential tools for assessing and testing the performance of Linux systems under various conditions.

In this guide, we are going to look at how to use a script and scriptreplay commands in Linux that can help you to record and replay terminal sessions.

Hard-coding is never the answer. Instead, use sshpass when you need to put a password in your Bash script.

gists - A place for me to post and share small, self-contained code snippets.

Lightweight rivals, both based on Crunchbang, OpenBox, and Debian

Configuring security in Postgres is often a highly manual task, but automation helps simplify and standardize managing access permissions.

The reason I discovered an ancient blog post the other day was that I had something new to say about Nix for the first time in over two years. The thing I want to say is this: nix-direnv is great. It fixes roughly every problem that I’ve had with nix-shell, and does so in a much nicer way than my previous ad-hoc solutions.

The 5 minutes guide to stop selling out your DNS queries to BigTech Software Development, API development, Indutrial IOT

The CLI sed is often misunderstood. Yet, it can be very useful to edit automatically a bunch of files directly in the shell or in a script.

If you are looking to create a encrypted tunnel from one Linux instance to another, the bet choice is SSH port forwarding.

Testcontainers is an opensource framework for providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

Swappiness is the kernel parameter that defines how much (and how often) your Linux kernel will copy RAM contents to swap. This parameters default va...

A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

In this tutorial, we will see how to do precisely that. We will learn several ways to create a directory in Python.

Use Vectorization — a super-fast alternative to loops in Python

There are various implementations. I am using nmap-ncat on rockOS 8 on both hosts. Netcat's using TCP by default and this test is not limited by disk I/O from what I understood. That said, it is not

If you do any remote Linux work with the Secure Shell, you shouldn't assume that it's locked down by default. Here is how to set up key authentication.

PSSH is a small Python-based program, which allows you to execute commands on multiple Linux remote servers in parallel at the same time using the single shell.

Port knocking works by closing off all ports and only opening them 'on demand,' according to a pre-determined sequence of pings.