Introduction to Polkit

Introduction to Polkit: Navigating Authorization Frameworks in Linux

Polkit is an authorization framework installed on every modern Linux distribution: it provides API which allow privileged applications to expose services to unprivileged subjects. Communications with Polkit happens over D-Bus, which is an IPC (Interprocess Comunication) system; to understand how the former works, we have to get a grasp of how the latter is implemented, first.

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How to configure Certificate Authority on Ubuntu/Debian

How to configure Certificate Authority on Ubuntu/Debian

A Certificate Authority plays a vital role in ensuring and verifying secure connections between clients and servers. When you try to connect to a remote server – let’s say a website, for example – how does your system know that it is connecting to the right place? After all, there is nothing stopping any rogue system from claiming itself as a website which it is actually not. This is where certificate authority servers come into play, by helping our client system verify that we are connecting to the intended server. This particular example is in the context of a website connection, so would involve the HTTPS protocol, but certificate authorities can also be used to authenticate other types of connections, such as VPN.

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Step-by-Step Guide: Adding Certificates to Ubuntu's Trusted Authorities

Step-by-Step Guide: Adding Certificates to Ubuntu’s Trusted Authorities

In today’s digital landscape, we must be careful to authenticate our network connections to remote servers. To help keep us secure, we use certificates that allow us to verify connections between clients and servers. A Certificate Authority is a crucial part of this process, as it is responsible for issuing the certificates to clients and servers, and verifying the devices that are trying to establish secure connections to each other.

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How to Check GPIO Status

How to check GPIO status

The GPIO (General Purpose Input/Output) pins of the Raspberry Pi are how the device can interface with external hardware components. It is how things like sensors and actuators plug into the Raspberry Pi, and allow users to control such devices from the Raspberry Pi itself. Something as simple as turning an LED on or off will require setting the pin to which it is plugged in to either true or false, which changes the current status of that pin.

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Raspberry Pi as Music Streamer

Raspberry Pi as Music Streamer

Thanks to its small size and simple requirements, the Raspberry Pi can be transformed into a variety of different specialized devices. One such role that it can fill is that of a dedicated music streamer, or jukebox. Whether you have your own music files (MP3, FLAC, etc) already downloaded and want to stream them to speakers around the house, or you rely on streaming services like Spotify or Pandora, utilizing the Raspberry Pi as a music streamer is a great way to enjoy some tunes. In this tutorial, we will go over the step by step instructions to help you turn your Raspberry Pi into the ideal music streaming device.

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StartOS Linux In-Depth Review: A Comprehensive Look at Performance, User Experience, and Compatibility

StartOS Linux In-Depth Review: A Comprehensive Look at Performance, User Experience, and Compatibility

StartOS (formerly known as EmbassyOS) is a graphical, browser based Linux distribution for servers by Start9. It offers users the ability to install and host a variety of services with a single click. On traditional servers, hosting services usually requires some level of specialized knowledge, tinkering on the command line, and spending time with perusing documentation. StartOS aims to simplify this process by providing an intuitive menu with which you can manage every aspect of your server, as well as anything you have decided to host from it.

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Converting VirtualBox OVA to QCOW2 for QEMU/KVM Deployment

Converting VirtualBox OVA to QCOW2 for QEMU/KVM Deployment

In this detailed guide, we will explore the process of converting a VirtualBox OVA file to the QCOW2 format, a necessary step for deploying virtual machines in a QEMU/KVM environment. This conversion is essential for users looking to transition from VirtualBox to a more scalable and open-source virtualization option like QEMU/KVM. We’ll cover each step of the process, from exporting your VirtualBox machine to finally deploying it on QEMU/KVM.

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Setting Up Virtual Machines with QEMU, KVM, and Virt-Manager on Debian/Ubuntu

Setting Up Virtual Machines with QEMU, KVM, and Virt-Manager on Debian/Ubuntu

Virtualization technology has become an indispensable tool in software development, testing, and deployment. It allows you to run multiple virtual machines (VMs) on a single physical machine, each with its own isolated operating system and resources. This tutorial focuses on setting up a virtualization environment on Debian or Ubuntu Linux using QEMU, KVM (Kernel-based Virtual Machine), and Virt-Manager.

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How to change username on Linux

How to change username on Linux

Changing a Linux account’s username is one of those user management tasks that can seem confusing or tricky at first, as it is not something that we need to do every day. Since so many settings are tied directly to an account’s username, it is generally not recommended to ever change it. But, if we find ourselves in a situation where the the username of an account absolutely needs to be changed, then we are not completely out of options.

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Enabling SSH on Ubuntu 24.04

Quick Guide to Enabling SSH on Ubuntu 24.04

Secure Shell (SSH) is an essential protocol for securely accessing networked machines remotely. SSH offers a secure channel over an unsecured network, providing strong authentication and encrypted data communications between two computers connecting over an open network such as the internet. Ubuntu 24.04, like its predecessors, supports SSH for remote administration, file transfer, and more. This guide will walk you through the process of enabling SSH on your Ubuntu 24.04 system, ensuring secure and remote management capabilities.

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