today's howtos
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How to Boot Raspberry Pi 4 from USB SSD? – Linux Hint
Raspberry Pi 4 firmware supports USB boot. You can easily boot your favorite operating system on your Raspberry Pi 4 from a USB HDD, SSD, or a USB thumb drive instead of the traditional microSD card.
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In this section, I am going to show you how to enable USB boot on Raspberry Pi 4.
Before you can enable USB boot on your Raspberry Pi 4, you must update all the existing packages of your Raspberry Pi OS. So that we can update the firmware and enable USB boot.
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Monitoring Temperature in Raspberry Pi – Linux Hint
Monitoring temperatures may be a requirement in many of your Raspberry Pi projects. It is relatively easy to do in Raspberry Pi and the components required for this project are not too costly.This article shows you how to use the DS18B20 digital thermometer module to monitor temperature using Raspberry Pi. The article also demonstrates how to create a web app to display the temperature.
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Raspberry PI VPN Server with PiVPN - peppe8o
Raspberry PI can provide a number of linux services able to easily solve problems to manage your home network with cheap solutions. Using an OS based on Debian, it can run Open Source software and drastically help you with your home ICT needs as well as small office needs.
A common need for increasing networking security and access your home services from outside is having a VPN (Virtual Private Network) server which grants secure access from an external network to your internal services.
A simple solution to implement OpenVPN or WireGuard (the 2 most widely known VPN open source serices) is using the convenient PiVPN setup tool.
In this tutorial I’m going to show you how to setup a VPN server with a cheap Raspberry PI Zero Wusing PiVPN and send certificate via email. This guide applies also to newer Raspberry PI boards.
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Understanding YAML for Ansible | Enable Sysadmin
If you write or use Ansible playbooks, then you're used to reading YAML configuration files. YAML can be deceptively simple and yet strangely overwhelming all at once, especially when you consider the endless possible Ansible modules at your disposal. It feels like it should be easy to jot down a few options in a YAML file and then run Ansible, but what options does your favorite module require? And why are some key-value pairs while others are lists?
YAML for Ansible can get complex, so understanding how Ansible modules translate to YAML is an important part of getting better at both. Before you can understand how YAML works for Ansible modules, you must understand the basics of YAML.
If you don't know the difference between a mapping block and a sequence block in YAML, read this quick introduction to the basics of YAML article.
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Using TRIM and DISCARD with SSDs attached to RAID controllers | Enable Sysadmin
SSDs are now commonplace and have been the default choice for performance-oriented disks in the enterprise and consumer environments for the past few years. SSDs are cool and fast but most people on high-end machines face this dilemma: My SSD is behind a RAID controller which doesn't expose the device's DISCARD or TRIM capabilities. How do I discard the blocks to keep the best SSD performance? Here's a trick to do just that without having to disassemble your machine. Recent improvements in SSD firmware have made the need for the applications writing to SSDs less stringent to use DISCARD/TRIM.
There are, however, some cases in which you may need to have the filesystem inform the drive of the blocks which it discarded. Perhaps you have TLC (3bits per cell) or QLC (4bits per cell) drives instead of the usually more expensive enterprise-class SLC or MLC drives (the latter are less susceptible to a performance drop since they put aside more extra blocks to help with overwrites when the drive is at capacity). Or maybe you once filled your SSD to 100%, and now you cannot get the original performance/IOPS back.
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How to play Among Us on Linux
Among Us is incredibly popular, but, sadly, the game does not have a native port for Linux. Thankfully, with a little tweaking, it is possible to get Among Us working on the Linux platform!
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How to add file folders to the XFCE4 menu
XFCE4 is an excellent Linux desktop environment, but one of its shortcomings is that users aren’t able to access folders directly from the menu like other modern desktops such as Gnome, KDE, Cinnamon, etc.
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How To Install Apache JMeter on Ubuntu 20.04 LTS - idroot
In this tutorial, we will show you how to install Apache JMeter on Ubuntu 20.04 LTS. For those of you who didn’t know, The Apache JMeter application is open-source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step by step installation of Apache JMeter on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian based distribution like Linux Mint.
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