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today's howtos

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HowTos
  • Fixing "cannot find signatures with metadata for snap" Error

    The other day I was trying to install massCode application. For installation, it provided a Snap file to download.

    [...]

    There are no signatures involved here.

    What happens is that you have downloaded a Snap installer file from a third party. The snap mechanism in Ubuntu expects you to get the snap packages from the official snap store.

    Since it doesn’t come from the snap store, you see the ‘cannot find signatures with metadata for snap’ error message. The error message is not descriptive, like most error messages.

  • How to Install WordPress with LAMP on SUSE Linux Enterprise

    Written in PHP, WordPress is one of the most popular and widely used CMS (Content Management Systems). It is free and open-source and is used for creating stunning websites by providing prebuilt feature-rich templates that are easily customizable. As such, you can create cool websites without the need to write any code.

    In this guide, we will demonstrate how to install WordPress with LAMP on SUSE Enterprise Server 15.

  • ow to install Visual Studio Code on Ubuntu 20.04|22.04 [Ed: No, do not install proprietary spyware from the company that attacks GNU/Linux. Use free/libre software which does not spy on the user and is not controlled by Microsoft]

    In this article we are going to learn how to install Visual Studio code also know as (VScode) on Ubuntu 22.04...

  • Manage your files in your Linux terminal with ranger | Opensource.com

    The most basic way to look at your files and folders is to use the commands ls and ll. But sometimes, I want to see not just the file metadata but also the contents of a file at a glance. For that, I use ranger.

    If you love working out of your console and using Vim or Vi, and you don’t want to leave your terminal for any reason, ranger is your new best friend. Ranger is a minimal file manager that allows you not only to navigate through the files but also to preview them. Ranger comes bundled with rifle, a file executor that can efficiently choose programs that work with a given file type.

  • How to Install Darktable on Fedora 36 Linux - LinuxCapable

    Darktable is a free and open-source photography application program and raw developer. Rather than being a raster graphics editor like Adobe Photoshop or GIMP, it comprises a subset of image editing operations specifically aimed at non-destructive raw image post-production. In addition to basic RAW conversion, Darktable is equipped with various tools for basic and advanced image editing.

    These include exposure correction, color management, white balance, image sharpening, noise reduction, perspective correction, and local retouching. As a result, Darktable is an incredibly powerful tool for photographers of all experience levels. Best of all, it is entirely free to download and use.

    In the following tutorial, you will learn how to install Darktable on Fedora 36 Linux workstation using the command line terminal.

massCode: A Free and Open-Source Code Snippet Manage

  • massCode: A Free and Open-Source Code Snippet Manager - It's FOSS

    If a tool makes things faster and efficient, that is a life-saver for many developers.

    While there are different services and platforms that try to make the coding experience quicker, you still have several other options to consider.

    For instance, a code snippet manager. With a snippet manager, you aim to save a section of code that you want to quickly access. It is more like assigning shortcuts to add the required code in your program.

    This is not a new concept, but the tools available for the job may not be entirely open-source.

    Fortunately, I stumbled upon a decent project that provides you with a free and open-source snippet manager, i.e., massCode.

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today's howtos

  • How to Change Comment Color in Vim – Fix Unreadable Blue Color

    Are you annoyed about the comment color in vim? The dark blue color of the comment is often hard to read. In this tutorial, we learn how to change the comment color in Vim. There are few methods we can use to look vim comment very readable.

  • How to Add Repository to Debian

    APT checks the health of all the packages, and dependencies of the package before installing it. APT fetches packages from one or more repositories. A repository (package source) is basically a network server. The term "package" refers to an individual file with a .deb extension that contains either all or part of an application. The normal installation comes with default repositories configured, but these contain only a few packages out of an ocean of free software available. In this tutorial, we learn how to add the package repository to Debian.

  • Making a Video of a Single Window

    I recently wanted to send someone a video of a program doing some interesting things in a single X11 window. Recording the whole desktop is easy (some readers may remember my post on Aeschylus which does just that) but it will include irrelevant (and possibly unwanted) parts of the screen, leading to unnecessarily large files. I couldn't immediately find a tool which did what I wanted on OpenBSD [1] but through a combination of xwininfo, FFmpeg, and hk I was able to put together exactly what I needed in short order. Even better, I was able to easily post-process the video to shrink its file size, speed it up, and contort it to the dimension requirements of various platforms. Here's a video straight out of the little script I put together: [...]

  • Things You Can And Can’t Do

    And it got me thinking about what you can and can’t do — what you do and don’t have control over.

  • allow-new-zones in BIND 9.16 on CentOS 8 Stream under SELinux

    We run these training systems with SELinux enabled (I wouldn’t, but my colleague likes it :-), and that’s the reason I aborted the lab: I couldn’t tell students how to solve the cause other than by disabling SELinux entirely, but there wasn’t enough time for that.

  • Will the IndieWeb Ever Become Mainstream?

    This is an interesting question, thanks for asking it, Jeremy. I do have some history with the IndieWeb, and some opinions, so let’s dive in.

    The short answer to the question is a resounding no, and it all boils down to the fact that the IndieWeb is really complicated to implement, so it will only ever appeal to developers.

  • How to Install CUPS Print Server on Ubuntu 22.04

    If your business has multiple personal computers in the network which need to print, then we need a device called a print server. Print server act intermediate between PC and printers which accept print jobs from PC and send them to respective printers. CUPS is the primary mechanism in the Unix-like operating system for printing and print services. It can allow a computer to act as a Print server. In this tutorial, we learn how to set up CUPS print server on Ubuntu 22.04.

Open Hardware: XON/XOFF and Raspberry Pi Pico

  • From XON/XOFF to Forward Incremental Search

    In the olden days of computing, software flow control with control codes XON and XOFF was a necessary feature that dumb terminals needed to support. When a terminal received more data than it could display, there needed to be a way for the terminal to tell the remote host to pause sending more data. The control code 19 was chosen for this. The control code 17 was chosen to tell the remote host to resume transmission of data.

  • Raspberry Pi Pico Used in Plug and Play System Monitor | Tom's Hardware

    Dmytro Panin is at it again, creating a teeny system monitor for his MacBook from scratch with help from our favorite microcontroller, the Raspberry Pi Pico. This plug-and-play system monitor (opens in new tab) lets him keep a close eye on resource usage without having to close any windows or launch any third-party programs. The device is Pico-powered and plugs right into the MacBook to function. It has a display screen that showcases a custom GUI featuring four bar graphs that update in real-time to show the performance of different components, including the CPU, GPU, memory, and SSD usage. It makes it possible to see how hard your PC is running at a glance.

Security Leftovers

How to Apply Accent Colour in Ubuntu Desktop

A step-by-step tutorial on how to apply accent colour in Ubuntu desktop (GNOME) with tips for Kubuntu and others. Read more