today's howtos

• Install Inkscape 1.0.2 In Ubuntu / LinuxMint / Debian | Tips On UNIX

  Inkscape is a free and open-source professional vector graphics editor software that runs on Linux, Mac OS X, and Windows desktop computers. It is suitable for illustrators and web designers and it is an alternative to Adobe Illustrator. It supports many SVG features (markers, alpha blending, clones, etc..) and easy to use.

• How to enable PowerTools on CentOS 8

  The PowerTools repository, which is available on CentOS/RHEL 8, provides developer related tools and libraries. Some EPEL packages depend on packages available from PowerTools. Thus if you have set up the EPEL repository on your CentOS, it is recommended that you enable PowerTools as well.

• Install gscan2pdf 2.11.0 in Ubuntu / Linux Mmint

  gscan2pdf a GUI tool used to produce PDF’s or DjVus from Scanned documents,gscan2pdf works on all Linux / BSD machines gscan2pdf team released a newer version 2.11.0 recently and yet to be updated in official Jeffrey Ratcliffe PPA for Ubuntu 20.04 and lower versions. This tutorial will be helpful for beginners to install gscan2pdf 2.11.0 in Ubuntu 20.10, Ubuntu 20.04, Linux Mint 20.1, and lower versions of Ubuntu and Linux Mint.

• How to set up WireGuard VPN server on Ubuntu 20.04

  Traditionally, VPN implementation has existed in two forms. In-kernel VPN implementation such as IPsec performs heavy-duty per-packet crypto processing in the kernel in a "bump-in-the-stack" fashion (i.e., between IP stack and the network drivers). This gives speed as there is no context switch between kernel and userspace during packet processing. But it comes with high management complexity in separate userspace control plane (e.g., IKE). An alternative form of VPN implementation is userspace TUN/TAP-based solutions such as OpenVPN, Tinc, n2n, where crypto processing is performed by a userspace VPN daemon. Naturally, these TUN/TAP-based VPN solutions have poor performance compared to IPsec mainly because network packets traverse the kernel and userspace boundary multiple times, resulting in frequent context switches and packet copies. Despite their performance disadvantage, userspace VPN solutions enjoy more popularty than the in-kernel counterpart due to their ease of use and configuration.

• How to create a lifecycle policy for an S3 Bucket on AWS

  We can use the Lifecycle Policy to manage the objects in S3 Bucket so that they are stored cost-effectively throughout. An S3 Lifecycle Policy is a set of rules used to define actions that Amazon S3 applies to objects in the bucket.

• How to change the hostname on Ubuntu 20.04 LTS

  In a Local Area Network (LAN) environment, computer systems need to communicate with each other based on their IP addresses. To learn and remember these IP addresses and sharing them when needed is a tricky business. In order to avoid such trouble, users tend to rename their system’s hostname for their own ease. The simpler hostnames will allow all computer users to coordinate easily without an exchange of large IP addresses. This whole scenario is quite related to the URLs and DNS server address, where the user is totally unaware of long addresses and simply use the URLs in their search engine. In this tutorial, I will show you two methods to change the hostname of an Ubuntu 20.04 system via the command line terminal and GUI. Users can opt either way to update the names and share them once they have finalized them.

• How To Delete Outdated Vagrant Boxes In Linux - OSTechNix

  You might have downloaded several versions of Vagrant boxes and some of them might be pretty outdated! If they are no longer required, you can safely delete outdated Vagrant boxes in Linux as described in this brief guide. Check for outdated Vagrant boxes I have been using Vagrant for the past few months for testing purposes. Since Vagrant version 1.5, boxes support versioning. The Box Versioning allows the developers who make boxes to push updates or fixes and the users to easily update the underlying box.

• LHB Digest #21.02: Uptime Monitoring, Terminal Shortcuts, Linux Commands Tips and More

• How To Install Java on Linux Mint 20 - idroot

  In this tutorial, we will show you how to install Java on Linux Mint 20. For those of you who didn’t know, Java is a very popular language when it comes to programming. It is a common language for android development and other enterprise solutions. It was first released by Sun Microsystems in 1995. Many programs and scripts require Java to run it, but usually, Java is not installed by default on a VPS or Dedicated Server.

• building a simple KVM switch for 30€ | die-welt.net

  Prompted by tweets from Lesley and Dave, I thought about KVM switches again and came up with a rather cheap solution to my individual situation (YMMY, as usual). As I've written last year, my desk has one monitor, keyboard and mouse and two computers. Since writing that post I got a new (bigger) monitor, but also an USB switch again (a DIGITUS USB 3.0 Sharing Switch) - this time one that doesn't freak out my dock \o/ However, having to switch the used computer in two places (USB and monitor) is rather inconvenient, but also getting an KVM switch that can do 4K@60Hz was out of question. Luckily, hackers gonna hack, everything, and not only receipt printers. There is a tool called ddcutil that can talk to your monitor and change various settings. And udev can execute commands when (USB) devices connect… You see where this is going?

• An introduction to hashing and checksums in Linux | Enable Sysadmin

  Always wondered how to make use of a checksum? This introduction shows you what they mean, and how to use the proper tools to verify the integrity of a file.

• How to remove background microphone noise in Windows, Mac, Linux

  Noisetorch is an open-source Linux application that allows you to create a virtual microphone that suppresses background noise. To filter out background noise in an application, simply select the virtual microphone instead of your regular microphone, and the application will filter out background noise.

• Craig Small: Percent CPU for processes

  The ps program gives a snapshot of the processes running on your Unix-like system. On most Linux installations, this will be the ps program from the procps project. While you can get a lot of information from the tool, a lot of the fields need further explanation or can give “wrong” or confusing information; or putting it another way, they provide the right information that looks wrong. One of these confusing fields is the %CPU or pcpu field. You can see this as the third field with the ps aux command. You only really need the u option to see it, but ps aux is a pretty common invokation.

Games: Stadia, Harvest Days, Lenna's Inception and More

• Stadia 'State Share' to launch with HITMAN 3 | GamingOnLinux

  One of the features Google talked about early with Stadia is finally coming and that is State Share. Allowing players to share specific playable moments of captures and it's launching with HITMAN 3. This is another tick in the box, finally, of nearly all the features promised by Google for Stadia well over a year after launch.

• Harvest Days is an upcoming open-ended country-life RPG

  Currently in development by a father and son team, Harvest Days is another fresh 3D take on the casual farming-life RPG and it will be coming to Linux too. There's quite a few of these appearing in the last year or two both 2D and 3D, many like this being directly inspired by the likes of Stardew Valley, Harvest Moon and Animal Crossing, among others. Perhaps this one might catch your attention where others have not? It actually looks pretty darn charming.

• Bytten Studio say not to sleep on Linux in their postmortem for Lenna's Inception | GamingOnLinux

  Lenna's Inception is a top-down Zelda-like action-adventure game with a world that is glitching, with a style that can switch between 8-bit and 32-bit pixel art styles. It's now been available for a year so Tom Coxon of Bytten Studio has written up a postmortem for how it went, and it was a thoroughly interesting read. First, a refresher on who they are. Bytten Studio was initially just Tom Coxon who previously worked for Chucklefish on titles like Starbound and the multiplayer for Stardew Valley, Coxon was later joined by Jay Baylis who also worked for Chucklefish in the past on titles like Starbound and Wargroove. [...] So the Linux version sold approximately 340 copies which at their normal price of £7.19 that would be somewhere around £2,444.6 (it went on sale once previously, so likely a bit lower). For a small indie developer, that can make all the difference.

• Irena Genesis Metal Fury is an upcoming shoot 'em up for the Sega Mega Drive | GamingOnLinux

  Sega Mega Drive (Sega Genesis)? That's not a piece of Linux gaming hardware last I checked? No but Irena Genesis Metal Fury is a new game coming for the retro console and will provide the ROM file for your favourite emulators. Here's the thing: I'm a huge retro fan and I grew up with the Sega Mega Drive so it always holds a special place in my early gaming years and helped me really appreciate games. Irena Genesis Metal Fury looks awesome too and the developer, White Ninja Studio, aren't ignoring Linux either.

• Godot Engine gets a sixth 3.2.4 beta with a new CPU lightmapper | GamingOnLinux

  The Godot team just keep on adding in big new features to make this one of the best free and open source game engines around and the next Beta update for Godot 3.2.4 is out now. [...] In other somewhat recent Godot news, the team recently blogged about their work on a glTF 2.0 scene exporter. What is glTF? A royalty-free specification for the efficient transmission and loading of 3D scenes and models by engines and applications, overseen by The Khronos Group (the same behind OpenGL, Vulkan and so on). Godot has been able to import glTF for some time now but the option to export it from Godot enables developers to quickly put it back into something like Blender, to make any changes needed to then bring the updates back into Godot. All very useful sounding.

Linux Support Is Coming To Allow De-Authorizing Thunderbolt Devices

While in recent years there has been growing interest in enhancing Linux's Thunderbolt security with offering security levels and other functionality to authorize supported/known Thunderbolt devices, surprisingly it's taken until 2021 to see the ability for Linux's Thunderbolt software connection manage to handle de-authorizing devices. If wanting to de-authorize a previously authorized Thunderbolt device for whatever reason or if wanting to establish policies like where on user log-out that devices would be automatically de-authorized, it's looking like Linux 5.12 will support this ability.