System & Network Admin

Install an SSL Certificate on NGINX to ensure a safe connection from your webserver to browsers. Set up SSL on NGINX with these simple steps.

OpenSearch is a community-driven, Apache 2.0-licensed open source search and analytics suite that makes it easy to ingest, search, visualize, and analyze data.

OpenSearch is a community-driven project by Amazon and a fork of Elasticsearch and Kibana. In this tutorial, you will install and set up OpenSearch - ...

What is a rogue DHCP server A rogue DHCP server is an unauthorized DHCP server that distributes knowingly or unknowingly wrong or malicious information to clients that send DHCP discover packets withi

In this article, we will explore the /etc/mtab file on a Linux system and understand the various parameters and directives included therein.

Instead of using CI/CD pipelines or Terraform Cloud, try this alternative approach to automating Terraform using Flux and GitOps.

In most cases, video editing software in Linux is free. If you want to try it, these are some of the best Linux video editors.

Screen is a terminal multiplexer and has a wide feature set. It allows you to split your terminal window into multiple windows (split screen feature), detach sessions to let commands run in the backgr

Explains how to set up ssh keys with YubiKey as two-factor authentication (2FA) to protect ssh keys stored on local Linux/macOS/BSD system.

In this article, you will learn what file globbing is in Linux and how to use it with various commands through practical examples.

Power over Ethernet - or short 'PoE' - allows you to supply DC power for another device over the ethernet network cable. The most common Power Source Equipment (PSE) types are switches and routers (en

PipeWire is a powerful contender to replace PulseAudio. Here we show you how to install and configure PipeWire on your Linux system.

The main DHCP configuration file is /etc/dhcp/dhcpd.conf. The file is used to store the network configuration information required by DHCP clients.

Trust us, it’s safer this way.

In this guide, we will learn about the head command using some practical examples to work with text files efficiently from the command line interface.

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TLDR; The following command will create a new SSH key using ED25519 with an auto-generated comment. ssh-keygen -t ed25519 -f $HOME/.ssh/id_ed25519 -C "$(whoami)@$(hostname)-$(date +'%y%m%d')" SSH Keys The best, and sometimes only, way to connect to a remote SSH server is via an SSH key. Allowing key only access to a SSH server massively reduces an attackers ability to brute force the server and raises the overall level of security.

Everybody knows a DNS response needs to fit into a 512 byte UDP packet, right? But suppose it doesn't fit...

I won't go into specific cases in this blog post. This is a general guide on how to gather the necessary information that will help you to get your problem fixed. In this post, I'll use a Linux client

A simple tutorial explaining the basics of who command in Linux with its parameters, syntax, usage and various examples.

Docker has become the new standard for building your application. In a Docker image we place our source code, its dependencies, some configurations and our application is almost ready to be deployed…

Advanced-Copy is a command line program that is very much similar, but a little modified version of the original cp and mv command with a progress bar.

Distributing and replicating data among Postgres servers

Cron jobs are not sufficiently stable as a method for backup automation. In this article, we explore how best to back up data in terms of setup, frequency, data retention and general automation best practices.

Passwordless logins are a great way to secure your server. This tutorial shows you how to set up passwordless SSH logins on Linux.

Teleport is an open-source that can be used as an access plane for your global infrastructure. It provides zero-trust access to various services such ...

There a multiple use cases to run a script on login. Configuration, starting services, logging, sending a notification, and so on. I want to show you different ways to do so. Example script The examp

How to fix docker compose not updating container with locally built images (i.e. the build argument in docker-compose).