Language Selection

English French German Italian Portuguese Spanish

today's howtos

Filed under
HowTos
  • How to install Steam with Ubuntu 21.04 - Unixcop

    Today we will see how to install Steam with Ubuntu 21.04. This is the ultimate destination for playing, discussing, and creating games. This is the official statement of the Steam website. A cross-platform where users can play or purchase games. While surfing across the official site, I was able to see more than five million gamers online. Now. you can imagine of polarity level of the platform.

  • Get the colour of any screen pixel

    I am currently investigating how to manage the situation when bootup results in a black screen.

  • How To Install XFCE Desktop Environment on Debian 11 - idroot

    In this tutorial, we will show you how to install XFCE Desktop Environment on Debian 11. For those of you who didn’t know, Xfce is a lightweight desktop environment for UNIX-like operating systems. It aims to be quick and light on system resources, while still being visually appealing and user friendly. Unlike GNOME and KDE desktops which are heavier, but XFCE uses fewer system resources.

    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 XFCE on a Debian 11 (Bullseye).

  • How to Access Remote Desktop from Browser Using TightVNC

    VNC stands for (Virtual Network Computing) is an open-source graphical desktop sharing tool for managing and control machines remotely using a VNC client called VNC Viewer.

  • How to Add a User to Sudoers on Fedora - LinuxCapable

    When installing Fedora, the user account created during the initial setup should have access to sudo rights. However, there may be a need to add additional sudo users or make the default user have sudo rights. This is a straightforward process with a few commands.

    In the following tutorial, you will learn to add a user to the sudoers group on any Fedora system.

  • How to Find and Kill Zombie Process on Linux

    Brief: This is a quick tip on finding zombie processes in Linux and then killing them. You also learn a thing or two about processes and zombie processes.

    Before you learn about Zombie process, let me recall what is a process in Linux.

    In a few words, a process is a running instance of a program in performance. It can be foreground (interactive process) or background (not interactive or automatic process). It can be a parent (creator of other processes during run-time) or child (process created by others) process.

    In Linux, except for the first init (or systemd) process with PID 0, every other process has a parent process. Processes also have their own child processes.

    Don’t believe me? Use the pstree command in terminal to look at the process tree to see the ‘family tree’ of your system’s processes.

  • How to Install Cockpit on Debian 11

    The Cockpit is a free and open-source server management application sponsored by Red Hat. It comes with a simple web-based admin interface to manage the server through the web browser instead of cli. It also provides information on CPU load, filesystem statistics, processes, and further information. It allows you to perform day-to-day system administrative tasks including, creating and managing users, troubleshoots network issues, upload and download files, and more.

    In this post, we will show you how to install and use Cockpit on Debian 11.

  • How to Install Jenkins on Rocky Linux 8

    Jenkins is an open-source continuous build system. It is a server-based application written in Java, and it typically runs as a background service on Windows or Unix machines. We use Jenkins to automatically monitor the repository for changes of our source code. As soon as someone pushes his/her changes to the central source code repository, Jenkins analyzes the new source files for changes. If it finds that the source file has changed since our last compilation, then Jenkins initiates a new build on our Continuous Integration Server.

  • How to Install MongoDB Compass on CentOS 8 - Unixcop

    MongoDB compass is the official GUI tool for MongoDB. You can add, delete, update, create Databases from GUI. It is specifically for someone who finds querying data using commands difficult.

    In this tutorial we will install mongoDB compass.

  • How to Install PHP Composer on Debian 11

    PHP Composer is a dependency manager for PHP. It uses a composer.json file placed in your project root which contains a description of the project, including its dependencies and other information such as author, license, and so on. With PHP Composer, you can install all necessary libraries to build a PHP application with just one command from your terminal.

    PHP Composer easily manages dependencies, libraries of your project. It also allows you to make a release of your application to other people or for yourself. You can think about PHP Composer as npm, bower, and bundler on JavaScript.

    In this tutorial, we will show you how to install Composer on Debian 11. All the steps should work on other Debian-based distributions as well.

  • How to Install Zirkula CMS on Ubuntu 20.04 – VITUX

    ZIkula means “plus” in Swahili language, so it translates as “more than” or “something more”. The name embodies what this project provides – an extension beyond common web technologies with tools like templates that help you create simple one-page websites all the way up to complex applications powered by Node JS modules & MVC architecture. You can create anything from basic one-page websites to sophisticated and powerful online apps with Zikula’s user-friendly interface. It is very simple to set up, so you will have no trouble making your vision come alive.

    In this guide, we’ll guide you through how to install Zikula and all of its requirements on an Ubuntu 20.04 system.

  • How to Install and Configure Postgres 14 Ubuntu 20.04

    In this guide we are going to install Postgresql 14 in Ubuntu 20.04.

    Postgresql is an open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance. Postgres, is a free and open-source relational database management system emphasizing extensibility and SQL compliance. It was originally named POSTGRES, referring to its origins as a successor to the Ingres database developed at the University of California, Berkeley. PostgreSQL is used as the primary data store or data warehouse for many web, mobile, geospatial, and analytics applications. PostgreSQL can store structured and unstructured data in a single product.

  • How to check your CPU in a Linux system

    To troubleshoot or build a software stack, you must not only know what type of architecture you work with, but also the details about your hardware and its performance. When it comes to Linux, you can gather that information via the command-line interface. The Linux CLI can provide you with detailed CPU information, such as the number of CPU cores, CPU architecture and CPU usage.

    You can use several specific commands to pull CPU information from your hardware, regardless of whether you use bare metal or virtualized hardware. These commands should work on any Linux distribution and should come preinstalled on your systems.

  • How to create Bootable USB using Ventoy on Ubuntu 21 - Unixcop

    Ventoy is a free and open source software to create bootable USB drives in Linux and Windows environment.

    You don’t need to format your USB device everytime you want it make bootable with another OS. you just have to create a bootable USB drive once and add as many as ISOs you want in future.

    Ventoy will automatically create entries for the newly added ISOs and add them to the boot menu.

    Once you created the multiboot USB, boot your system with the USB drive, select the ISO you want to load and start using it.

  • How to install Chromium Browser on Debian 11 (Bullseye) – VITUX

    Google’s Chromium browser is a Google project. It is an open-source web browser whose major objective is to make online browsing safer and quicker for all users. This browser is not designed for end-users, but rather for developers or programmers, because Google makes changes to its source code practically every day. As a result, it is critical to obtain the most recent version of this web program. The Chromium browser is available for nearly every Linux distribution, including Ubuntu, Debian, CentOS, and Fedora, as well as Windows, Android, and macOS.

    In this tutorial, we will demonstrate how to install the Chromium browser on the Debian 11 bullseye distribution. The instructions for installing the Chromium browser will also work for other Linux distributions such as Debian 10 buster, Ubuntu, LinuxMint, and others.

  • How to install Chromium Browser on Debian 11 (Bullseye) – VITUX

    First of all, we need to know what is the openfire which is one of Ignite open Realtime projects.

    Open Realtime:

    So Ignite Realtime is the community site for the users and developers of Jive Software’s open source Real Time Communications projects.Your involvement is helping to change the open RTC landscape.

  • How to install Ubuntu 21.10 - Invidious

    In this video, I am going to show how to install Ubuntu 21.10.

  • How to manage users and groups in Linux | Enable Sysadmin

    "What skills must Linux administrators have?" is way too broad a question for any single article. But there are plenty of general must-have sysadmin skills—and user and group administration are chief among them. Proper user account management enables Linux to enforce access controls (permissions) and audit who does what on the system.

    The commands below are written for Red Hat Enterprise Linux (RHEL) and RHEL-like distributions, but the concepts apply to any distribution of Linux. Knowing the skills and commands outlined in this article (and its two follow-up pieces, which dive deeper into user admin and group admin) helps ensure you're ready for the day-to-day user and group administration tasks a sysadmin is called on to do.

  • How to use PS command - Unixcop

    Using a system without monitoring what’s happening in the background is not a good thing to do -especially in Linux- because as a result, you may be consuming resources in the wrong side of the city, or your system may be not properly utilized in the manner way.

    There are some systems depend almost exclusively on the GUI screens to monitor the system, and some people may prefer this method, but we will talk about one of the traditional, essential and effective ways to monitor our Linux system which is the PS command

  • File timestamps in Linux - atime, mtime and ctime

    In the Linux system, the system provides a file with three timestamps, namely access timestamp (atime), change timestamp (mtime), and change timestamp (ctime). Linux stores the timestamp in the Unix epoch instead of the actual date and time. The Unix epoch is the number of seconds from 00:00:00 on January 1, 1970.

    This article will help you understand Linux file timestamps and how file timestamps work. I have used for all the examples in this article an Ubuntu 20.04 system. Let's first discuss the definition and how we can display it in our Linux system.

More in Tux Machines

Security Leftovers

  • Linux Fixes Spectre V1 SWAPGS Mitigation After Being Partially Borked Since Last Year - Phoronix

    This week's set of "x86/urgent" changes for the Linux 5.16-rc4 kernel due out later today has some Spectre V1 fixes after kernel commits last year ended up partially messing things up around its SWAPGS handling. These fixes in turn will also likely be back-ported to relevant stable kernel series. Thanks to an Alibaba engineer, Lai Jiangshan, are some important fixes around the Spectre V1 SWAPGS mitigation that are landing today in the mainline kernel.

  • Reproducible Builds: Reproducible Builds in November 2021

    As a quick recap, whilst anyone may inspect the source code of free software for malicious flaws, almost all software is distributed to end users as pre-compiled binaries. The motivation behind the reproducible builds effort is therefore to ensure no flaws have been introduced during this compilation process by promising identical results are always generated from a given source, thus allowing multiple third-parties to come to a consensus on whether a build was compromised. If you are interested in contributing to our project, please visit our Contribute page on our website.

  • Reproducible Builds (diffoscope): diffoscope 195 released

    The diffoscope maintainers are pleased to announce the release of diffoscope version 195. This version includes the following changes:

    [ Chris Lamb ]
    * Don't use the runtime platform's native endianness when unpacking .pyc
      files to fix test failures on big-endian machines.
    

Linux 5.16-rc4

Fairly small rc4 this week. Three areas stand out in the diff: some
kvm fixes (and tests), network driver fixes, and the tegra SoC sound
fixes.

The rest is fairly spread out: drm fixes, some filesystem stuff,
various arch updates, and some smattering of random driver fixes.

Nothing looks all that scary, although I certainly hope the kvm side
will calm down.

                  Linus
Read more Also: Linux 5.16-rc4 Released - "Nothing Looks All That Scary"

EFF Argument in Patent Troll Case to Be Livestreamed on Monday

At 10 am Monday, FOSS folks and others interested in software patent litigation will have a chance to have a firsthand look at how our courts address patent cases. The case involves a “notorious patent troll,” according to Electronic Frontiers Foundation, that is trying to hide information from Apple, which it’s suing. “At a federal appeals court hearing that will be livestreamed, attorney Alexandra H. Moss, Executive Director at Public Interest Patent Law Institute, who is assisting EFF in the case, will argue that a judge’s order to unseal all documents and preserve public access in the case of Uniloc USA, Inc. v. Apple Inc. should be upheld,” EFF said in a statement on Thursday. “Uniloc is entitled to resolve its patent dispute in publicly-funded courts, Moss will argue, but it’s not entitled to do so secretly.” EFF said that this is the second time the plaintiff, Uniloc, has appealed an order to be more transparent in this case. Read more

Gnuastro 0.16 released

Dear all,

I am happy to announce the 16th official release of GNU Astronomy
Utilities (Gnuastro version 0.16).

Gnuastro is an official GNU package, consisting of various
command-line programs and library functions for the manipulation and
analysis of (astronomical) data. All the programs share the same basic
command-line user interface (modeled on GNU Coreutils). For the full
list of Gnuastro's library, programs, and a comprehensive general
tutorial (recommended place to start using Gnuastro), please see the
links below respectively:

https://www.gnu.org/s/gnuastro/manual/html_node/Gnuastro-library.html
https://www.gnu.org/s/gnuastro/manual/html_node/Gnuastro-programs-list.html
https://www.gnu.org/s/gnuastro/manual/html_node/General-program-usage-tutorial.html

For a complete review of the new/changed features in this release,
please see [1] below (also available in the 'NEWS' file within the
source code tarball).

Here is the compressed source and the GPG detached signature for this
release. To uncompress Lzip tarballs, see [2]. To check the validity
of the tarballs using the GPG detached signature (*.sig) see [3]:

  https://ftp.gnu.org/gnu/gnuastro/gnuastro-0.16.tar.lz    (3.7MB)
  https://ftp.gnu.org/gnu/gnuastro/gnuastro-0.16.tar.gz    (5.9MB)
  https://ftp.gnu.org/gnu/gnuastro/gnuastro-0.16.tar.gz.sig (833B)
  https://ftp.gnu.org/gnu/gnuastro/gnuastro-0.16.tar.lz.sig (833B)

Here are the SHA1 and SHA256 checksums (other ways to check if the
tarball you download is what we distributed). Just note that the
SHA256 checksum is base64 encoded, instead of the hexadecimal encoding
that most checksum tools default to.

fe1f84bf1be270f1a62091e9a5f89bb94b182154  gnuastro-0.16.tar.lz
B4hftfYuyc7x3I6aEJ2SQlkp6x7zOOrPz/bK2koGuR8  gnuastro-0.16.tar.lz
1ae00673648fe8db5630f1de9d70b49fadb42d7d  gnuastro-0.16.tar.gz
kMEdJbsFrRNxDLX4EXntgXNgikJv3/2LIEWGLV/e4i0  gnuastro-0.16.tar.gz

For this release, Pedram Ashofteh Ardakani, Natáli D. Anzanello,
Sepideh Eskandarlou, Raúl Infante-Sainz, Vladimir Markelov and Zahra
Sharbaf directly contributed to the source of Gnuastro, I am very
grateful to all of them. I should also thank Alejandro Serrano
Borlaff, Fernando Buitrago, Mark Calabretta, Zohreh Ghaffari, Giulia
Golini, Leslie Hunt, Raúl Infante-Sainz, Matthias Kluge, Juan Miro,
Juan Molina Tobar, Markus Schaney, Zahra Sharbaf, Vincenzo Testa,
Ignacio Trujillo and Aaron Watkins for their very good suggestions or
bug reports that have been implemented in Gnuastro 0.16.

If any of Gnuastro's programs or libraries are useful in your work,
please cite _and_ acknowledge them. For citation and acknowledgment
guidelines, run the relevant programs with a `--cite' option (it can
be different for different programs, so run it for all the programs
you use). Citations _and_ acknowledgments are vital for the continued
work on Gnuastro, so please don't forget to support us by doing so.

This tarball was bootstrapped (created) with the tools below. Note
that you don't need these to build Gnuastro from the tarball, these
are the tools that were used to make the tarball itself. They are only
mentioned here to be able to reproduce/recreate this tarball later.
  Texinfo 6.8
  Autoconf 2.71
  Automake 1.16.4
  Help2man 1.48.5
  ImageMagick 7.1.0-9
  Gnulib v0.1-4944-g7fc3219bc
  Autoconf archives v2021.02.19-29-g0fbee2a

The dependencies to build Gnuastro from this tarball on your system
are described here:
  https://www.gnu.org/s/gnuastro/manual/html_node/Dependencies.html

Best wishes,
Mohammad
Read more