System & Network Admin

I've tried to install the ubuntu-18.04.2-server-arm64.iso with libvirt Virtual Machine Manager to have an aarch64 (same as arm64) Ubuntu VM. But it displays a message "Failed to setup UEFI for AAr...

A few weeks ago, I wasted a lot of time (and hair) trying to run Raspbian in a VM, so that I could run it as part of my CI system and build software for it. I eventually managed to get something runni

In this guide, we have shown you through the process of setting up ModSecurity with Apache on Debian/Ubuntu systems to detect and block unwanted traffic.

I'll admit it: I'm a fan of Linux. While I've used Slackware on workstations and Red Hat Enterprise Linux (RHEL) on servers for years, I love seeing how other distributions do things. What's more, I really like to test applications and scripts I write on other distributions to ensure portability. In fact, that's one of the great advantages of Linux, as I see it: You can download a distro and test your software on it for free.

It seems SSDs aren't as failure-resistant as many of us thought.

Everyone chats. Everyone chats with different apps and services. But which is the best? You might be surprised at the conclusion Jack Wallen draws.

Tremor is an event-processing engine that focuses on ease of use, performance and efficient resource utilization.

Windows 11 has a lot to offer, but a few features are going by the wayside.

Measuring the energy consumption of software is far from being a trivial task. This article provides essential details about energy consumption tools, their...

Explains how to install qrencode command on Linux & generate WireGuard QR code on Linux for iOS or Android mobile for faster deployments

The Speed of Time

Microsoft Exchange has for many years been nearly unavoidable as a platform for groupware environments. Late in 2020, however, an Austrian open source software developer introduced grommunio, a groupware server and client with a look and feel familiar to Exchange and Outlook users.

A flurry of alternative apps have become available for the preinstalled Windows software and utilities. We list some of the best here.

Bash supports three types of loops, namely for loop, while loop and until loop. In this guide, we will learn about while and until loops.

Today I wanted to call some extra attention to those little things, the ones that don't get the spotlight, but simply make a developer's life better.

There are several ways to switch to the root user in Linux, and it can be confusing. Learn the differences between each command and their use cases.

NVMe stands for Non-Volatile Memory Express, and it refers to how software and storage communicate across PCIe and other protocols, including TCP. It's an open specification led by a non-profit organization and defines several forms of solid-state storage. [OS_EMBEDDED_MENU_RIGHT:]My laptop has an NVMe drive, as does my desktop. And they're fast. I love how quickly my computers boot and how quickly they're able to read and write data. There's no perceptible delay.

The networking startup says the new platform is aimed at "the other side of the house" from its usual network engineering customers.

GitOps has become more than a buzzword in the DevOps community. It consists of a set of best practices designed to better deploy, manage and monitor

This article introduces developers to eBPF and explains how it can be used to add security, networking, and other capabilities in the Linux kernel space.

This post will demonstrate how to use eBPF to trace encrypted connections that operate over TLS (or its predecessor, SSL). TLS has become the standard for…

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Dynamic packet capture is a Kubernetes-native way to troubleshoot your microservices and applications without granting extra permissions.

Nowadays you can hear lot about microservices. Spring Boot is an excellent choice for building single microservice but you need to interconnect them somehow. That’s what Spring Cloud tries to solve (among other things) – especially Spring Cloud Netflix. It provides various components e.g. Eureka discovery service together with client side load balancer Ribbon for inter-microservice...