System & Network Admin

If you work at a hosting provider or CDN, ACME’s DNS-01 validation method can make it a lot easier to onboard new customers who have an existing HTTPS website at another provider. Before your new customer points their domain name at your servers, you need to have a certificate already installed for them. Otherwise visitors to the customer’s site will see an outage for a few minutes while you issue and install a certificate.

Learn how, when and why to use Let's Encrypt on AWS - and when give up use Amazon ACM-generated certificates instead to remain sane.

A symbolic link, also known as a symlink or soft link, is a special type of file that points to another file or directory. In this guide, we will cover how to use the ln command to create symbolic links.

Linux is, without a doubt, one of the single most flexible operating system platforms on the planet. With the flagship open source ecosystem, there is almost nothing you cannot do. What makes Linux so flexible? The answer to that question will depend on your needs. Suffice it to say, the list of answers is significant …

Can we make working at the command line a little less cumbersome?

Qaze is the powerful GUI management solution for NATS clusters

Wasabi is making cloud data storage simple, affordable, fast and secure. It’s all we do, and we do it better than anyone.

Install, manage several Python versions on a Windows computer and use them from the terminal and in virtual environments.

dysk, like df but better

OrcaCore - Install Portainer Docker GUI on Debian 12 - Advanced Linux

Learn how to install Docker on Debian 12 properly. Also learn to run Docker without sudo and remove it when not needed.

Set up a tmux session selection menu for SSH login to easily switch between or start new tmux sessions with a simple script in Linux.

Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need.

Backups are a vital part of keeping your data safe and secure. Learn some of the best backup software that you can install in Linux today.

Last Christmas, I bought my wife “Explain the cloud like I am 10” after she told me many times that it was hard for her to relate to what I am doing in my daily work at Qovery. While so far, I have been the sole reader to enjoy the book, I was wondering during my lecture if there were any resources to explain how to build all that.

This yt-dlp tutorial lists the most common yt-dlp commands for downloading videos and audio from YouTube and various other websites on Linux.

When it comes to Kubernetes best practices, generative AI still has much to learn and should not be seen as a silver bullet. Human knowledge still outpaces AI.

For those who found Nextcloud is too challenging to install, the project developers have created an All-In-One solution that makes deploying Nextcloud incredibly simple.

Cron scripts are responsible for critical Slack functionality. They ensure reminders execute on time, email notifications are sent, and databases are cleaned up, among other things. Over the years, both the number of cron scripts and the amount of data these scripts process have increased. While generally these cron scripts executed as expected, over time …

Use this tutorial to set up a Mastodon server and build a community for your website using a free and open source software solution.

MikroTik makes networking hardware and software, which is used in nearly all countries of the world. Our mission is to make existing Internet technologies faster, more powerful and affordable to wider range of users.

Keycloak is an open source identity and access management solution

An extended look at SSH features that can serve a variety of purposes for different use cases.

Tracing provides visibility into a system allowing the developers and operations to observe the application during runtime. Tracing becomes extremely valuable when the systems are growing and interact…