System & Network Admin

All Linux users know commands like grep, ls or ifconfig but have you ever wondering if there is the contemporary alternative? Here is my list of modern Linux commands I use every day. For you convenience, I added apt command to install them but they are also available on Fedora and Arch using dnf and pacman. Check out details in the readme on package’s Github. htop - colorful top Both commands list processes managed by kernel in dynamic real-time mode.

Here are some faster, better and feature rich alternative command line tools to replace the decades old legacy Linux commands.

Git, as well as services like Github, are built and optimized for lightweight text-based code files, and it’s rare to see repositories larger than a few GB. But, it’s often useful to track large files, and to make that easier, Git provides the Large File Storage (LFS) extension.

Git Large File Storage (LFS) replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git, while storing the file contents on a remote server like GitHub.com or GitHub Enterprise.

Object storage makes it possible to store massive amounts of unstructured data that is written once and read many times.

Tailscale lets you put all your devices on their own private tailnet so they can reach each other, ACLs permitting. Usually that’s nice and comforting, knowing that all your devices can then be isolated from the internet, without any ports needing to be open to the world.

k3s is a lightweight kubernetes distribution and works incredibly well. It packages all its dependencies, runs using sqlite in place of etcd (although it can use a number of backends!), and has a much lower memory footprint. Building the k3s binary from scratch is quite confusing, but since its a static binary, we don’t have to worry about this. We can simply fetch the built binary from github and run it.

Git reflog, git gc, git bisect, and git worktree are just a few of the tools I use routinely.

I’ll skip the background about the Twitter migration, and the space we’ve created at hachyderm.io because Kris Nóva tells it better.

A little K8s knowledge everyday!

These traditional Linux utilities have been revitalized with modern replacements.

YouTube downloader in python using pytube module. It has just five lines of code and you can download the HD video format.

The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.

One of the reasons the IBM PC platform became the dominant standard for desktop PCs back in the mid-1980s was its open hardware design, based around what would later be called the ISA bus. Any manu…

The Network Time Protocol (NTP) is a protocol used to synchronize Linux system clocks automatically over a network using the chrony NTP client.

All Pleroma development

Sharing and supporting local musicwith digital public spaces

In this guide, we will show how to remove an SSL certificate and ssh private key passphrase using the openssl and ssh-keygen command line tools.

The ideal swap configuration depends on your use case and the amount of physical RAM in your host computer.

We cover using LetsEncrypt to create SSL certificates with a HAProxy load balancer.

To learn how Kubernetes works you should run your own Kubernetes cluster on bare-metal hardware. Discuss this post In the world that I live in Kubernetes is all the rage. This is the world of professional software development and deployment where medium- and large-sized companies are trying to reduce cost and complexity of their IT platforms while at the same time becoming faster at making changes to the software that they run as services to either their internal or external customers.

Find all keyboard shortcuts and tips and more about technology on DefKey.com!

Zram is a tool for creating an in-RAM compressed cache, specifically for use as swap space.

apt-offline is an offline package management tool that is used to install/upgrade software packages with their dependencies on Debian-based Linux distributions.

Scanning a QR code on an Android or an iPhone is quite easy these days. This tutorial explains how to scan QR codes that are part of an image.

SSH certificates allow system administrators to SSH into machines without having to manage authorized keys in the servers. In summary, you create a key pair to be used as a Certificate Authority (CA), and add the public key of that key pair to the server: TrustedUserCAKeys /etc/ssh/my-root-ca.pub Then, usually, a system administrator or an automated system creates certificates for the users that need to access the servers. Those certificates are created with the CA’s private key, the user’s public key, a list of principals and a validity period.