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today's howtos

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HowTos
  • How To Install Play Framework on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install Play Framework on Ubuntu 20.04 LTS. For those of you who didn’t know, Play Framework is a framework that allows us to make web applications with Java and Scala in a fast and easy way. These applications are based on scalability and the possibility that they can be adapted to many different needs.

    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 the step-by-step installation of Play Framework 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.

  • How to Fix Sudo Command Not Found in Debian 10

    Sudo also called “superuser do” is a command in Linux that allows you to run high-privilege admin commands as a root user. It asked to enter your personal password and confirms your requests by checking a sudoers file.

    After a fresh Debian 10 installation, you could not execute the privileges tasks by running the sudo command. You will get the error ‘sudo command not found in Debian 10′. The reason for this error is the sudo command isn’t included in Debian 10 by default.

    In this post, we will show you how to fix sudo command not found in Debian 10 VPS.

  • How to Replace a Variable in a File Using SED

    Want to know the tricks of replacing a variable in a file using the SED command?

    This article will give you an overview of replacing a variable value in a file using SED. Before replacing a variable in a file using SED, you need to understand what SED is, the syntax of SED, and how SED works.

    I’ll also show how to perform delete operations using SED. This will come after the variable value replacement part. If you’re looking for that, you can directly jump onto that, and skip the rest.

    So, let’s begin the guide.

  • How to Transfer Files Between Linux, Android, and iOS Using Snapdrop

    Cross-platform file sharing has never been easy. Of course, you have services like AirDrop, Nearby Share, and Quick Share, but they only work within their ecosystems.

    As a result, if you want to transfer files from Linux to an Android/iOS device or vice-versa, you need a cross-platform file sharing service. Even though you do have a few different options in this regard, Snapdrop is the most effective file-sharing service of the lot.

  • What to do when your Chromebook is no longer supported

    Recently, my Chromebook Pixel 2015 found itself no longer supported. I really loved that Chromebook. The two of us wrote several novels together and the keyboard/screen was unmatched. To this day I've yet to experience a better keyboard/trackpad combo. But, as they say, all things must end. So, when I received the notification that my Chromebook Pixel would no longer be receiving updates, I felt a tinge of sadness. Sure, I had a Pixelbook as a backup device, but it just wasn't the same. It had a nice keyboard, but it was nowhere near that of the Pixel. And the screen? There was zero comparison.

    I had a choice: Continue using the Pixel, even though it would no longer be receiving upgrades, or do something about it.

One more

  • How to install the Opera Browser on Linux Lite 5.4

    Today we are going to look at how to install the Opera Browser on Linux Lite 5.4. As seen in the video, a person downloads Opera, from the official site, and then installs it with the built-in installer. Enjoy!

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More in Tux Machines

Free Software Stigma and Upcoming Events

  • Why Do Companies Still Have a Fear of Open Source?

    Open Source Software, since its birth, has made people wonder about its effects. The debate is never-ending, and for the right reasons. Giants like Apple have often viewed Open Source skeptically because they are mostly unfounded. However, one cannot deny that these sources are functional and flexible. They are also partly responsible for bringing the technological world in the right direction. But are they worth it? In this article, we shall learn all about open source companies and why use open source software, and why open source software is still not greeted warmly by certain companies. Therefore, without further ado, let's start right away.

  • Samuel Iglesias: X.Org Developers Conference 2021

    Last week we had our most loved annual conference: X.Org Developers Conference 2021. As a reminder, due to COVID-19 situation in Europe (and its respective restrictions on travel and events), we kept it virtual again this year… which is a pity as the former venue was Gdańsk, a very beautiful city (see picture below if you don’t believe me!) in Poland. Let’s see if we can finally have an XDC there! [...] Big shout-out to the XDC 2021 organizers (Intel) represented by Radosław Szwichtenberg, Ryszard Knop and Maciej Ramotowski. They did an awesome job on having a very smooth conference. I can tell you that they promptly fixed any issue that happened, all of that behind the scenes so that the attendees not even noticed anything most of the times! That is what good conference organizers do!

  • Open Source Summit + Embedded Linux Conference 2021

    This month has been nothing short of hectic, with back to back to back conferences filling up the calendar. Following Linaro Virual Connect, XDC, and Linux Plumbers (which ends today), Collaborans will be attending (virtually) next week's Open Source Summit + Embedded Linux Conference 2021. Connecting the open source ecosystem under one roof, the conference is "a unique environment for cross-collaboration between developers, sysadmins, devops, architects and others who are driving technology forward". Taking place from September 27-30, the event will be held in a hybrid format for the first time, with both in-person and virtual offerings, to ensure that everyone who wants to participate is able to do so.

Programming/Development Leftovers

  • New tool: an nginx playground

    On Wednesday I was talking to a friend about how it would be cool to have an nginx playground website where you can just paste in an nginx config and test it out. And then I realized it might actually be pretty easy to build, so got excited and started coding and I built it.

  • Pandas to check cell value is NaN

    The main documentation of the pandas is saying null values are missing values. We can denote the missing or null values as NaN in the pandas as most developers do. The NaN and None keywords are both used by developers to show the missing values in the dataframe. The best thing in the pandas is that it treats both NaN and None similarly. To check the missing value of a cell, pandas.notnull will return False in both cases of NaN and None if the cell has NaN or None. So, in this article, we will explore different methods to check whether a particular cell value is null or not (NaN or None).

  • gfldex: Convolution

    Flavio wrote a straightforward solution to PWC-131-1 and wondered if there is a idiomatic way. Assuming, that “idiomatic” means to use language features which lesser languages refuse to require, I’m happy to deliver convoluted code.

  • Perl Weekly Challenge 131: Consecutive Arrays

    These are some answers to task 1 of the Week 131 of the Perl Weekly Challenge organized by Mohammad S. Anwar. Spoiler Alert: This weekly challenge deadline is due in a few days from now (on September 26, 2021 at 24:00). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

  • My Favorite Modules: if | Tom Wyant [blogs.perl.org]

    My blog post My Favorite Warnings: redundant and missing touched on the use of the if module. Comments on that post made me think it deserved a top-level treatment, expanding on (though not necessarily improving on) Aristotle's comment.

CutefishOS: Unix-y development model? Check. macOS aesthetic? Check (if you like that sort of thing)

One of the reasons Linux has never caught on as a desktop operating system, as Linux fans know, is that Linux isn't a desktop operating system, it's a kernel. And assembling it into a coherent package users can install is the job of a distribution. This is a very different distribution model than the one Apple or Microsoft uses, and it confuses newcomers. Windows and macOS are easier to understand, they are single things made by single companies. Canonical and Red Hat notwithstanding, Linux is not packaged and presented this way at all. I've long believed that this difference is one of the key stumbling blocks to wider Linux adoption. Apple has macOS, Microsoft has Windows, Linux has... hundreds of awkward, confusingly named options. This is both Linux's greatest strength, and its greatest weakness. For those who already understand and use it the options are welcome. I've been a Linux user for over a decade and I've used several dozen distros, some of them so different from one another it's difficult to believe they're built from the same base. This wealth of options is great, but it's both confusing and overwhelming for new users. Distributions like elementary OS are popular with people switching from macOS and Windows because elementary OS offers that same highly polished, all-in-one package that makes the transition from proprietary operating systems smoother. But this is Linux, so you can't just have elementary OS. The latest distro to catch my eye is CutefishOS, which owes considerable design debt to both elementaryOS and the operating system made by that fruit company. Read more

BattlEye confirms Linux support for Steam Deck

  • BattlEye confirms Linux support for Steam Deck, will be opt-in like Easy Anti-Cheat

    Just recently we had Epic Games announce that Easy Anti-Cheat now offers proper native Linux support and in addition support for Wine and Steam Play Proton - now we have BattlEye also confirming the same readying up for the Steam Deck.

  • BattlEye To Support Valve's Steam Deck / Proton

    Yesterday it was Epic Games confirming Easy Anti-Cheat for Linux and Wine/Proton ahead of the Steam Deck launch and today it's BattlEye confirming Proton / Steam Deck support. BattlEye has already provided native Linux support albeit not widely used. Today they tweeted that they will also be supporting the upcoming Steam Deck or more specifically the use of BattlEye within Proton. BattlEye is making this opt-in for game developers who wish to support its usage under Wine / Proton.