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Updated: 1 hour 43 min ago

How To Install & Setup Nagios Core On Raspberry PI

2 hours 7 min ago
Have you ever thought about how some of the World’s biggest companies monitor hundreds of devices? If not, then do it now because, in this tutorial, I am going to introduce you to Nagios. Nagios is a monitoring solution that can monitor a few devices in your house or hundreds of devices, services, network protocols in a multi-billion company.

Fix Can't Login After Logout With Gnome / GDM3 On Ubuntu

5 hours 10 min ago
I've had an issue for some time: after logging out, I was unable to login to the default Ubuntu (Gnome) session. After some digging, I managed to find a fix for this issue, so here's a solution in case you too are experiencing this "can't login again after logout" problem.

How to Install Grav CMS with Nginx on Fedora 30

6 hours 53 min ago
In this tutorial, we will go through the Grav CMS installation and setup on the Fedora 30 system by using NGINX as a web server, and optionally you can secure the transport layer by using Acme.sh client and Let's Encrypt certificate authority to add SSL support.

How to use MapTool to build an interactive dungeon RPG

9 hours 26 min ago
In my previous article on MapTool, I explained how to download, install, and configure your own private, open source virtual tabletop so you and your friends can play a role-playing game (RPG) together. MapTool is a complex application with lots of features, and this article demonstrates how a game master (GM) can make the most of it.

A beginners guide to Linux permissions

11 hours 9 min ago
One of the main benefits of Linux systems is that they are known to be less prone to security vulnerabilities and exploits than other systems. Linux definitely gives users more flexibility and granular controls over its file systems[he]#039[/he] security permissions. This may imply that it[he]#039[/he]s critical for Linux users to understand security permissions. That isn[he]#039[/he]t necessarily true, but it[he]#039[/he]s still wise for beginning users to understand the basics of Linux permissions. 

How to Backup Users Home Directory In Linux Using Tar Command?

12 hours 52 min ago
Taking a regular backups of your important data is a good practice. tar is one of the best command for a local or manual backup solution.It’s not limited only to users home directory and you can backup any directories.

Linux on things that don't normally have Linux

15 hours 26 min ago
An exploration of places where you may not think to find Linux

Bash Source Command

Tuesday 18th of June 2019 06:31:48 AM
The source command reads and executes commands from the file specified as its argument in the current shell environment.

Microsoft's Edge gang pops a head above the parapet to give Linux fans a strong 'maybe'

Tuesday 18th of June 2019 04:48:53 AM
Also: storage migration, Mac development and The Trillion Dollar Man performs the dividend dance. Roundup The Edge team subjected itself to the dubious mercies of keyboard warriors in a Reddit AMA, a new Mac Visual Studio and storage shenanigans – it's just another week at Microsoft.…

DJI spices up Matrice drones with 2nd Gen Manifold computer running Ubuntu with snaps

Tuesday 18th of June 2019 03:05:58 AM
Canonical announced Ubuntu snaps support for DJI’s second-gen Manifold companion computer for its Matrice drones. The Manifold 2 offers a choice of Jetson TX2 or Intel Coffee Lake-U chips. DJI’s industry leading drones such as its Phantom and Matrice models are directed by flight controllers that run a proprietary operating system. Yet, in 2015, the […]

How to Install Qmmp Media Player, a Winamp alternative, on Ubuntu

Tuesday 18th of June 2019 01:23:02 AM
If you are looking for something that works in Linux as good as Winamp works in Windows, Qmmp is a great choice. In this article, we will describe two ways for you to install/uninstall Qmmp on Ubuntu.

Best Free Books to Learn about CoffeeScript

Monday 17th of June 2019 11:40:06 PM
The focus of this article is to select the finest CoffeeScript books which help programmers become proficient coding in this language. The books selected help developers to take full advantage of the power of CoffeeScript.

How to install ONLYOFFICE 10.0 on Ubuntu 18.04 LTS

Monday 17th of June 2019 09:57:10 PM
ONLYOFFICE is an open source solution that comprises online editors for text documents, spreadsheets, and presentations, as well as productivity tools such as mail, document and project management, CRM, calendar, communication hub.

10 PRINT Memorial in New Hampshire marks the birthplace of BASIC

Monday 17th of June 2019 08:14:15 PM
20 GOTO 10After just over 55 years, the birthplace of BASIC has been honoured with a memorial marker in New Hampshire.…

FreeBSD 11.3-RC1 Available, Lenovo ThinkPad P To Come With Ubuntu Pre-Installed, Star Labs Now Offers Zorin OS On Laptops, Remote Monitoring Software Pulseway v6.3.3 Released, PCLinuxOS KDE Full Editi

Monday 17th of June 2019 06:31:20 PM
FreeBSD 11.3-RC1 is now officially available with installation images for amd64, i386, aarch64, armv6 and more. This release contains mostly bug fixes.

Filesystem Hierarchy Standard

Monday 17th of June 2019 04:48:25 PM
What are these weird directories, and why are they there?

What language?

Monday 17th of June 2019 03:05:30 PM
We recently asked our writers this question: what[he]#039[/he]s your favorite "dead" language? Some of the responses were not at all what we were expecting. For starters, perhaps we should have specified that we were asking about programming languages.

Cylon – The Arch Linux Maintenance Program For Newbies

Monday 17th of June 2019 01:51:10 PM
Cylon script provides a lot of tools and features to maintain your Arch Linux system.

Use ImageGlass to quickly view JPG images as a slideshow

Monday 17th of June 2019 12:36:50 PM
Welcome to today’s episode of "How Can I Make This Work?" In my case, I was trying to view a folder of JPG images as a slideshow on Windows 10. As often happens, I turned to open source to solve the issue.

More in Tux Machines

today's howtos

All Linux, all the time: Supercomputers Top 500

Starting at the top, two IBM-built supercomputers, Summit and Sierra, at the Department of Energy's Oak Ridge National Laboratory (ORNL) in Tennessee and Lawrence Livermore National Laboratory in California, respectively to the bottom -- a Lenovo Xeon-powered box in China -- all of them run Linux. Linux supports more hardware architectures than any other operating system. In supercomputers, it supports both clusters, such as Summit and Sierra, the most common architecture, and Massively Parallel Processing (MPP), which is used by the number three computer Sunway TaihuLight. When it comes to high-performance computing (HPC), Intel dominates the TOP500 by providing processing power to 95.6% of all systems included on the list. That said, IBM's POWER powers the fastest supercomputers. One supercomputer works its high-speed magic with Arm processors: Sandia Labs' Astra, an HPE design, which uses over 130-thousand Cavium ThunderX2 cores. And, what do all these processors run? Linux, of course. . 133 systems of the Top 500 supercomputers are using either accelerator or co-processor setups. Of these most are using Nvidia GPUs. And, once more, it's Linux conducting the hardware in a symphony of speed. Read more

Red Hat and SUSE Leftovers

  • Are DevOps certifications valuable? 10 pros and cons
  • Kubernetes 1.15: Enabling the Workloads
    The last mile for any enterprise IT system is the application. In order to enable those applications to function properly, an entire ecosystem of services, APIs, databases and edge servers must exist. As Carl Sagan once said, “If you wish to make an apple pie from scratch, you must first invent the universe.” To create that IT universe, however, we must have control over its elements. In the Kubernetes universe, the individual solar systems and planets are now Operators, and the fundamental laws of that universe have solidified to the point where civilizations can grow and take root. Discarding the metaphor, we can see this in the introduction of Object Count Quota Support For Custom Resources. In English, this enables administrators to count and limit the number of Kubernetes resources across the broader ecosystem in a given cluster. This means services like Knative, Istio, and even Operators like the CrunchyData PostgreSQL Operator, the MongoDB Operator or the Redis Operator can be controlled via quota using the same mechanisms that standard Kubernetes resources have enjoyed for many releases. That’s great for developers, who can now be limited by certain expectations. It would not benefit the cluster for a bad bit of code to create 30 new PostgreSQL clusters because someone forgot to add a “;” at the end of a line. Call them “guardrails” that protect against unbounded object growth in your etcd database.
  • Red Hat named HPE’s Partner of the Year at HPE Discover 2019
    For more than 19 years, Red Hat has collaborated with HPE to develop, deliver and support trusted solutions that can create value and fuel transformation for customers. Our work together has grown over these nearly two decades and our solutions now include Linux, containers and telecommunications technologies, to name just a few. As a testament to our collaboration, HPE has named Red Hat the Technology Partner of the Year 2019 for Hybrid Cloud Solutions.
  • Demystifying Containers – Part II: Container Runtimes
    This series of blog posts and corresponding talks aims to provide you with a pragmatic view on containers from a historic perspective. Together we will discover modern cloud architectures layer by layer, which means we will start at the Linux Kernel level and end up at writing our own secure cloud native applications. Simple examples paired with the historic background will guide you from the beginning with a minimal Linux environment up to crafting secure containers, which fit perfectly into todays’ and futures’ orchestration world. In the end it should be much easier to understand how features within the Linux kernel, container tools, runtimes, software defined networks and orchestration software like Kubernetes are designed and how they work under the hood.
  • Edge > Core > Cloud: Transform the Way You Want
    For more than 25 years, SUSE has been very successful in delivering enterprise-grade Linux to our customers. And as IT infrastructure has shifted and evolved, so have we. For instance, we enabled and supported the move to software-defined data centers as virtualization and containerization technologies became more prevalent and data growth demanded a new approach.
  • SUSE OpenStack Cloud Technology Preview Takes Flight
    We are pleased to announce that as of today we are making a technology preview of a containerized version of SUSE OpenStack Cloud available that will demonstrate a future direction for our product. The lifecycle management for this technology preview is based on an upstream OpenStack project called Airship, which SUSE has been using and contributing to for some time. This follows our open / open policy of upstream first and community involvement.

NSA Back Doors in Windows Causing Chaos While Media is Obsessing Over DoS Linux Bug

  • U.S. Government Announces Critical Warning For Microsoft Windows Users
    The United States Department of Homeland Security's Cybersecurity and Infrastructure Security Agency (CISA) has gone public with a warning to Microsoft Windows users regarding a critical security vulnerability. By issuing the "update now" warning, CISA has joined the likes of Microsoft itself and the National Security Agency (NSA) in warning Windows users of the danger from the BlueKeep vulnerability. This latest warning, and many would argue the one with most gravitas, comes hot on the heels of Yaniv Balmas, the global head of cyber research at security vendor Check Point, telling me in an interview for SC Magazine UK that "it's now a race against the clock by cyber criminals which makes this vulnerability a ticking cyber bomb." Balmas also predicted that it will only be "a matter of weeks" before attackers started exploiting BlueKeep. The CISA alert appears to confirm this, stating that it has, "coordinated with external stakeholders and determined that Windows 2000 is vulnerable to BlueKeep." That it can confirm a remote code execution on Windows 2000 might not sound too frightening, this is an old operating system after all, it would be unwise to classify this as an exercise in fear, uncertainty and doubt. Until now, the exploits that have been developed, at least those seen in operation, did nothing more than crash the computer. Achieving remote code execution brings the specter of the BlueKeep worm into view as it brings control of infected machines to the attacker.
  • Netflix uncovers SACK Panic vuln that can bork Linux-based systems