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Updated: 37 min 9 sec ago

Setup A Shared Folder Between KVM Host And Guest In Linux

Friday 7th of May 2021 08:56:43 AM
This guide explains how to setup a shared folder between KVM host and guest virtual machine using Virt-manager in Linux.

Static and dynamic IP address configurations: DHCP deployment

Friday 7th of May 2021 07:42:23 AM
Configure a DHCP server and scope to provide dynamic IP address configurations to your network subnet.

How to Clone Virtual Machine in VirtualBox

Friday 7th of May 2021 06:28:03 AM
Installing a fresh operating system on VirtualBox is easy and can be done in a short time. After that, there are so many steps like installing packages, hardening the OS, updating drivers, configuring development environments, etc.. have to be done.

How to customize Bash Terminal prompt on Debian 10

Friday 7th of May 2021 05:13:43 AM
The bash Linux shell provides many customization options for the prompt that you can use not only to incorporate various features in the prompt but also to differentiate them through different colors. This tutorial shows you how to customize bash prompt.

The quest for faster Python: Pyston returns to open source, Facebook releases Cinder, or should devs just use PyPy?

Friday 7th of May 2021 03:59:22 AM
Official CPython is slow, but there are many ways to get better performanceFacebook has released Cinder, used internally in Instagram to improve Python performance, while another faster Python, called Pyston, has released version 2.2 and made the project open source (again).…

Open Mainframe Project Launches Call for Proposals for the 2nd Annual Open Mainframe Summit on September 22-23

Friday 7th of May 2021 02:45:02 AM
Registration for the Virtual Event is now Open SAN FRANCISCO, May 5, 2021 – The Open Mainframe Project (OMP), an open source initiative that enables collaboration across the mainframe community to develop shared tool sets and resources, today announced plans for its 2nd annual Open Mainframe Summit, the premier mainframe event of 2021.

Martian rover has some Linux computers, too

Friday 7th of May 2021 01:30:42 AM
NASA’s Perseverance rover is equipped with a Linux-driven, Atom-based CompuLab COMEX-IE38 module designed to compress images. The rover also has a Qualcomm 801 Linux system like its Ingenuity copter, which is embarking on a new scouting mission. As LinuxGizmos and many other sites reported in February, NASA’s semi-autonomous Ingenuity drone copter is equipped with an […]

Ubuntu Touch OTA-17 Arrives May 12 with NFC Support, Available for Testing Now

Friday 7th of May 2021 12:16:21 AM
The UBports Foundation announced a call for testing for their upcoming Ubuntu Touch OTA-17 software update for supported Ubuntu phones, which is slated for release on May 12th, 2021.

How to configure and manage firewalld rules in Linux

Thursday 6th of May 2021 11:02:01 PM
The firewall is essential for controlling the flow of network traffic in and out of the Linux server. It enables users to control incoming network traffic on host machines by defining a set of firewall rules. It must be enabled on production servers facing the Internet, to protect those servers from unauthorized access. This is one of those security features that ensures your system security at network level. In this guide, we’ll show you how to add, remove, enable, and disable firewalld rules & zones.

How to Kill Linux Processes/Unresponsive Applications Using ‘xkill’ Command

Thursday 6th of May 2021 09:47:41 PM
The kill command sends a signal to a process, whose PID is passed along with the command. Alternatively, we can use pkill command, which kills a process based upon name and other attributes of a process. To kill a process say whose name is terminal, we need to execute

LFCA: Learn Cloud Costs and Budgeting – Part 16

Thursday 6th of May 2021 08:33:21 PM
Over the years, there has been an exponential adoption of Cloud services as organizations seek to tap into the numerous benefits offered by the Cloud to streamline their businesses. Most businesses have either integrated their on-premise infrastructure with the Cloud or shifted their core services to the cloud altogether.

Learn essential Kubernetes commands with a new cheat sheet

Thursday 6th of May 2021 07:19:01 PM
The cloud runs largely on Kubernetes, Kubernetes largely runs on Linux, and Linux runs best when it has a skilled sysadmin at the controls. Whether you consider yourself a cloud architect or just a humble sysadmin, the modern internet needs users who understand how applications and services can be created within containers, scaled on demand, and monitored and managed judiciously. One of the first steps into the brave world of containers is learning Kubernetes and its quintessential command: kubectl.

Resolve DHCPD and HTTPD startup failures with Ansible

Thursday 6th of May 2021 06:04:41 PM
Last year, I had a problem: HTTPD (the Apache web server) would not start on a reboot or cold boot. To fix it, I added an override file, /etc/systemd/system/httpd.service.d/override.conf. It contained the following statements to delay HTTPD[he]#039[/he]s startup until the network is properly started and online. (If you[he]#039[/he]ve read my previous articles, you[he]#039[/he]ll know that I use NetworkManager and systemd, not the old SystemV network service and start scripts).

New Relic open sources Pixie, its Kubernetes-native in-cluster observability platform

Thursday 6th of May 2021 04:50:20 PM
Want to know what[he]#039[/he]s really going on in your Kubernetes cluster? Pixie, which just became a Cloud Native Computing Foundation program, can help.

GNOME 3.38.6 Desktop Environment Released with Various Bug Fixes

Thursday 6th of May 2021 03:36:00 PM
The GNOME Project release today GNOME 3.38.6 as the sixth maintenance update to the GNOME 3.38 desktop environment series, addressing various bugs and updating translations.

Nitrux 1.4 Is One of the First Distros to Support Linux Kernel 5.12

Thursday 6th of May 2021 02:21:40 PM
Uri Herrera from the Nitrux project announced the release of Nitrux 1.4 as the latest ISO release of this Debian-based and KDE oriented GNU/Linux distribution for the masses.

How to Manipulate Filenames Having Spaces and Special Characters in Linux

Thursday 6th of May 2021 01:07:19 PM
We come across files and folders name very regularly. In most of the cases file/folder name are related to the content of the file/folder and starts with number and characters. Alpha-Numeric file name are pretty common and very widely used, but this is not the case when we have to deal with file/folder name that has special characters in them.

Multisite WordPress Cluster Auto Installation

Thursday 6th of May 2021 11:52:59 AM
If you have multiple standalone WordPress websites, then it’s a good idea to go with WordPress multisite network. Multisite WordPress installation allows you to create and manage multiple WordPress websites from a single dashboard. This way, you can edit and update all of your websites from a single place. You can also install and activate plugins and themes for multiple sites at once. RoseHosting Cloud platform provides an easier way to deploy an auto-scalable WordPress Multisite cluster in a single click.

What Google v. Oracle means for open source

Thursday 6th of May 2021 10:38:39 AM
Google v. Oracle has finally concluded in a sweeping 6-2 decision by the US Supreme Court favoring Google and adding further clarity on the freedom to use application programming interfaces (APIs). Software developers can benefit from this decision.

How to Install Latest LibreOffice in Linux Desktop

Thursday 6th of May 2021 09:24:19 AM
LibreOffice is an open-source and much powerful personal productivity office suite for Linux, Windows & Mac, that provides feature-rich functions for word documents, data processing, spreadsheets, presentation, drawing, Calc, Math, and much more.

More in Tux Machines

Videos/Shows: Ubuntu Cinnamon Remix 21.04, Coder Radio, and KDE Breeze Redesign and Blue Ocean

NetBSD: aiomixer, X/Open Curses and ncurses, and other news

aiomixer is an application that I've been maintaining outside of NetBSD for a few years. It was available as a package, and was a "graphical" (curses, terminal-based) mixer for NetBSD's audio API, inspired by programs like alsamixer. For some time I've thought that it should be integrated into the NetBSD base system - it's small and simple, very useful, and many developers and users had it installed (some told me that they would install it on all of their machines that needed audio output). For my particular use case, as well as my NetBSD laptop, I have some small NetBSD machines around the house plugged into speakers that I play music from. Sometimes I like to SSH into them to adjust the playback volume, and it's often easier to do visually than with mixerctl(1). However, there was one problem: when I first wrote aiomixer 2 years ago, I was intimidated by the curses API, so opted to use the Curses Development Kit instead. This turned out to be a mistake, as not only was CDK inflexible for an application like aiomixer, it introduced a hard dependency on ncurses. Read more

Core Scheduling Looks Like It Will Be Ready For Linux 5.14 To Avoid Disabling SMT/HT

It looks like the years-long effort around CPU core scheduling that's been worked on by multiple vendors in light of CPU security vulnerabilities threatening SMT/HT security will see mainline later this summer with Linux 5.14. Linux core scheduling has been worked on by pretty much all of the hyperscalers and public cloud providers to improve security without disabling Hyper Threading. Core scheduling is ultimately about what resources can share a CPU core and ensuring potentially unsafe tasks don't run on a sibling thread of a trusted task. Read more

IBM/Red Hat/Fedora Leftovers

  • Automating RHEL for Edge image rollback with GreenBoot

    With the release of Red Hat Enterprise Linux (RHEL) 8.3, Red Hat announced an rpm-ostree version of RHEL targeted for Edge use cases called RHEL for Edge. One of the unique features of rpm-ostree is that when you update the operating system, a new deployment is created, and the previous deployment is also retained. This means that if there are issues on the updated version of the operating system, you can roll back to the previous deployment with a single rpm-ostree command, or by selecting the previous deployment in the GRUB boot loader. While this ability to manually roll back is very useful, it still requires manual intervention. Edge computing use case scenarios might be up in the tens or hundreds of thousands of nodes, and with this number of systems, automation is critical. In addition, in Edge deployments, these systems might be across the country or across the world, and it might not be practical to access a console on them in the event of issues with an updated image. This is why RHEL for Edge includes GreenBoot, which can automate RHEL for Edge operating system rollbacks. This post will cover an overview of how to get started with GreenBoot and will walk through an example of using GreenBoot.

  • Using Ansible to configure Podman containers

    In complex IT infrastructure, there are many repetitive tasks. Running those tasks successfully is not easy. Human error always presents a chance of failure. With help of Ansible, you perform all of the tasks through a remote host and, as the tasks are executed with playbooks, and those playbooks can be reused as many times as you need. In this article you will learn how to install and configure Ansible on Fedora Linux and describe how to use it to manage and configure Podman containers. Ansible Ansible is an open source infrastructure automation tool sponsored by Red Hat. It can deal with all the problems that come with large infrastructure, like installing & updating packages, taking backups, ensuring specific services are always running, and much more. You do this with a playbook which is written in YAML. Ansible playbooks can be used again and again, making the system administrator’s job less complex. Playbooks also eliminate repetitive tasks and can be easily modified. But we have many automation tools like Ansible, why use it? Unlike some other configuration management tools, Ansible is agentless: you don’t have to install anything on managed nodes. For more information about Ansible, see the Ansible tag in Fedora Magazine.

  • Getting better at counting rpm-ostree based systems

    Since the release of Fedora 32, a new mechanism has been in place to better count the number of Fedora users while respecting their privacy. This system is explicitly designed to make sure that no personally identifiable information is sent from counted systems. It also insures that the Fedora infrastructure does not collect any personal data. The nickname for this new counting mechanism is “Count Me”, from the option name. Details are available in DNF Better Counting change request for Fedora 32. In short, the Count Me mechanism works by telling Fedora servers how old your system is (with a very large approximation). This occurs randomly during a metadata refresh request performed by DNF.

  • Cockpit 244

    Cockpit is the modern Linux admin interface. We release regularly. Here are the release notes from Cockpit version 244 and Cockpit Machines 244.

  • A brief introduction to Ansible Vault

    Ansible Vault is an Ansible feature that helps you encrypt confidential information without compromising security.