Computers and technology

[ad_1] Puppet is a Systems Configuration Management/Systems Automation framework written in Ruby that allows system administrators to programmatically provision, configure, and manage servers, network devices, and storage, in a data center or in the cloud. Puppet 4 On RHEL 7 and CentOS 7 makes it easy to create customized system …

[ad_1] I need to update installed packages for security on CentOS 8.x (CentOS Enterprise Linux) server. How can I update my CentOS 8.x system using yum command? Keeping your system, kernel, docker and the installed application is an essential sysadmin task. An updated CentOS 8 system means fewer security issues …

[ad_1] Welcome to Getting started with Xen Virtualization On CentOS 7.x. Xen is an open-source bare-metal hypervisor which allows you to run different operating systems in parallel on a single host machine. This type of hypervisor is normally referred to as a hypervisortype 1 in Virtualization world. Meltdown and Spectre Mitigation …

[ad_1] How do I remove Santa Hat in VLC media player that displayed during Christmas time during 18th December to 1st January? When you open the VLC media player in December, you may notice Santa’s hat. Look in the system tray area, and you will see that VLC traffic cones …

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[ad_1] What you’ll learn Choose the most effective platform strategy for your business Understand the advantages and disadvantages of Native vs. Hybrid and iOS vs. Android apps Predict the timeline for starting your business and effectively allocate your time Decide between hiring in-house employees or contractors Choose whether or not …

[ad_1] Overview of Hyper-V Hyper-V is a Microsoft Product that is used to accomplish hardware virtualization. Virtualization as you know basically allows you to run several virtual machines (software computer) on the same hardware. These virtual machines behave exactly like a native/normal computer allowing you to install applications on top …

[ad_1] How can I rename an VM, instance or server in OpenStack?. Once you create an instance in OpenStack, you can modify its name in running state. This is true if the service running in the VM is changed, and the name needs to be updated to reflect the same. …

[ad_1] Can I install oVirt Guest Agent on CentOS 8 / RHEL 8 Linux guest?. The oVirt / Red Hat Virtualization guest agent provides information, notifications, and actions between the oVirt web interface and the guest. The agent provides the Machine Name, Operating System, IP Addresses, Installed Applications, Network and …

[ad_1] How can I install Vagrant on CentOS 8 / RHEL 8 Linux system?. Vagrant is a command line tool that enables you to create and configure portable and reproducible development environments and demo labs. The product is developed by HashiCorp. With Vagrant, you can setup your development environments in …

[ad_1] How to create a CentOS 8 VM using Vagrant?, how can I run CentOS 8 on KVM/VirtualBox/VMWare using Vagrant?, Can I use Vagrant to manage CentOS 8 virtual machine?. Vagrant enables you to create and configure reproducible, and portable development environments using Virtual machine images called Boxes. With Vagrant, …

[ad_1] I have been using vagrant to manage my Virtual Machines for long time. Vagrant provides you with such cool Virtual Machines control system. I tried creating a virtual machine on my Fedora 23 Distribution but got error message “the provider ‘libvirt’ could not be found, but was requested to …

[ad_1] This will show you how to extend Any operating system’s Virtual Hard Disk running on VirtualBox ; both vdi and VMDK virtual hard drive formats. When i was working on a vagrant box i downloaded from the internet, it had only 10GB allocated. After filling up the space, i …

[ad_1] This guide will teach you how to configure X11 forwarding to use on Virtual Machine instances managed by Vagrant. This is a series Tutorial on building Virtual Labs with Vagrant and VirtualBox.We also have the following tutorials on Vagrant: X11 forwarding is crucial when you want to launch an …

[ad_1] This simple guide will show you the easiest way to convert VDI disk image to use on your Openstack Cloud environment. It’s easy to use and you just have to install few packages. We have covered many tutorials previously on VDI and VMDK including: Step by step guide on …

[ad_1] This guide will demonstrate a simple way to add an extra virtual hard disk to Virtual Machine running on VirtualBox and create a mount point for it. We’ll also make the disk added auto-mount as the VM is booting up. Follow the steps below to add an extrat hard …

[ad_1] This will guide you on packaging existing environments to use with Vagrant, replacing the shared disk with a new box file. These box files can make managing virtual machines and different versions of these virtual machines vastly simpler, especially, if you don’t want to build environments from base boxes …

[ad_1] In this guide, you will learn to Install KVM Hypervisor Virtualization server on Ubuntu 20.04 (Focal Fossa). KVM (Kernel-based Virtual Machine) is a free and open source virtualization solution for Linux Systems running on x86 hardware. It requires the server to have CPU virtualization extensions (Intel VT or AMD-V). …

[ad_1] This guide will discuss how one can create a CentOS 8 KVM image to be used on OpenStack when creating CentOS 8 instances. CentOS 8 was released on September 24th, 2019 and guys are starting to adopt it for running Production workloads. OpenStack is one of the main Virtualization/Cloud …

[ad_1] This is a short tutorial on how to create a Vagrant box from existing Virtual Machine. Vagrant tool gives you the best environment to manage and control your Virtual Machines. This works on any Linux Distribution. Installing Vagrant box from scratch may not be an efficient way if you …

[ad_1] How do I check the physical health of a USB stick in Linux operating systems? How do I check USB flash drive in Linux? Can you tell me Linux command to test and detect bad sector in USB flash memory or pen drives? USB pen or stick is popular …

[ad_1] Hello guys. Today we’ll look at How to install centos 7 box with vagrant on virtualbox. Below are the steps to follow1) First download the Centos 7 vagrant box from the link http://www.vagrantbox.es/. Direct Link to download the CentOS 7 box Once the download is complete, create a vagrant …

[ad_1] Want to install a Server / Virtual Machine from an ISO file on oVirt or RHEV Virtualization platform?. oVirt is a free and open-source virtualization solution for designed for running large-scale and mission critical workload on production environments. oVirt provides kernel-based virtual machine management for multi-node virtualization servers. The …

[ad_1] How can i add FreeBSD 12 Cloud image to OpenStack?, How do i create FreeBSD 12 instances on OpenStack platform. FreeBSD is an open source Unix based operating system used to power embedded systems, modern servers and desktops. The FreeBSD has a large community which continues to develop it …

[ad_1] If you just downloaded Kali Linux 2.0 and want to run it on Vmware Workstation you’ll have to install Vmware tools on the guest os to keep going. Doing so requires few commands to be executed and get done. Follow the following steps to successfully install VMware tools on …

[ad_1] Welcome to our guide on how to How to install Virtualbox Latest on Ubuntu and Kali Linux. VirtualBox allows you to run more than one operating system at a time. This way, you can run software written for one operating system on another (for example, Windows software on Linux …

[ad_1] In this guide, we will cover the installation of VirtualBox 6 on Debian 10. (Buster) Linux. VirtualBox 6 is available for Windows and Linux users with plenty of new features. For those new to VirtualBox, it is a free to use and feature-rich Virtualization platform for x86 and AMD64/Intel64 …

[ad_1] In this guide, we will discuss the installation of Proxmox VE 6 server on Debian 10 (Buster) Linux system. The recommended and supported Proxmox VE server installation is usually done via Bare-metal_ISO_Installer, but there are scenarios where it makes sense to install on a running Debian Server. Proxmox Virtual …

[ad_1] The default configuration of OpenStack Nova compute service does not automatically start Virtual Machines each time the compute node boots or restarts. In this short guide, I’ll show you how to Configure Openstack Nova to automatically start guests that were running before the host rebooted. Login to your Openstack …

[ad_1] Welcome to our article on How to install Linux Kernel Headers on Kali Linux 2.0. Just installed Kali Linux 2.0 or upgraded to Kali Linux 2.0 and you need to install Kernel headers?. On our previous article, we talked about how to upgrade to Kali Linux 2.0 (Kali Sana) …

[ad_1] If you’re a fan of terraform and KVM, I’m assured you’ve been looking for a way to provision Virtual Machines on KVM in automated manner with Terraform. In this blog post, I’ll walk you through installation of Terraform KVM provider and using it to manage instances running on KVM …

[ad_1] Want to deploy a single Server Openstack Cloud on Ubuntu 18.04 for Development and test purposes?. This guide is fit for Developers and SysAdmins looking for a simple Openstack Deployment for Learning, PoC, and Development. DevStack is a collection of scripts which enables you to deploy a complete OpenStack …

[ad_1] How can I extend / increase / grow a virtual Disk in KVM?. I personally use KVM for all Linux virtualization projects. Sometimes I need to extend or add disk space to my running VM (guest) to satisfy growing software requirements. KVM uses QEMU which supports several image types, …

[ad_1] This guide will show you how to easily install VMware Workstation pro/player on Arch Linux / Manjaro Linux distribution. VMware Workstation is a hypervisor used for running multiple operating systems on a single Linux or Windows PC. It enables developers and users to set up virtual machines on a …

[ad_1] I got an error message “Failed to initialize a valid firewall backend” on my Arch Linux machine while trying to create Virtual Machines on KVM using Libvirt. You’ll often get this error as a result of missed dependency during KVM installation on Arch Linux / Manjaro or similar line …

[ad_1] How do I test and validate DNSSEC using the dig command line under Linux, macOS, *BSD, and Unix-like systems? The DNSSEC is an acronym for Domain Name System Security Extensions. It is a suite of Internet Engineering Task Force (IETF) specifications for securing certain kinds of information provided by …

[ad_1] How do I see Time-To-Live (TTL) for a DNS record using Linux, macOS, *BSD, or Unix-like systems command line option? How do I find my DNS TTL? TTL is an acronym for “Time To Live.” You can set TTL for the DNS record that defines how long a resolver …

[ad_1] How do I add / create a sudo user on CentOS Linux 8 using the command line? CentOS is a free and open source Enterprise Linux distro derived from upstream distro called Red Hat Enterprise Linux (RHEL). CentOS mostly used on servers and clusters. The sudo command allows users …

[ad_1] I set up a new cloud server, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in CentOS 8 (CentOS Enterprise Linux 8)? How do I write simple bash completion code in CentOS 8? Introduction: Bash is a free and open source …

[ad_1] I am a new OpenSUSE Linux 15.x sysadmin. How do I set up a firewall using FirwallD on OpenSUSE Linux 15.1? An OpenSUSE Linux firewall used to protect your cloud server or desktop from unwanted traffic. You can set up rules to either block traffic or allow through. OpenSUSE …

[ad_1] How do I enable and configure TLS 1.2 and 1.3 only in Nginx web server? TLS is an acronym for Transport Layer Security. It is cryptographic protocols designed to provide network communications security. TLS used by websites and other apps such as IM (instant messaging), email, web browsers, VoIP, …

[ad_1] I have two LXD containers running. One is for Nginx, and another is for processing data. I need to share data between two containers. How do I add or mount a shared directory between two?One can manage devices of running containers using lxc command. To add devices such as …

[ad_1] How do I create a new user account on CentOS 7/8 Linux server using command-line options? How do I create a new user account with sudo access on CentOS 8 Linux server? A CentOS Linux user account created to provide security barriers between various apps and other users of …

[ad_1] How do I Install Nginx on CentOS 8 Linux server? How can configure the latest version of Nginx web server on a CentOS Enterprise Linux 8 server using the CLI and host a static site? Nginx [engine X] is a free and open-source high-performance web server. It also acts …

[ad_1] How do I check installed packages in CentOS Linux version 6.x/7.x/8.x? How can I List installed packages on CentOS Enterprise Linux server? This page shows you how to check and list all installed packages in CentOS Linux server version 6.x/7.x/8.x using various command-line utilities. Such a list is useful …

[ad_1] Kubectl is a command line utility used to control and manage Kubernetes clusters and objects running it them. Kubectl enables you to create, modify and delete various Kubernetes resources such as Deployments, Pods, Services, switching contexts and even to access container shell. We’ll start with the installation of kubectl …

[ad_1] In today’s guide, we’ll discuss how you can install PHP Composer on CentOS 8 Linux machine. Composer is a PHP application package manager created to provide a standard format for managing dependencies of PHP software and required libraries. This tool is helpful when a developer want to manage and …

[ad_1] Introduction Let’s see how you can configure NTP Server on Windows Server 2019. The Windows Time service uses the Network Time Protocol (NTP) to help synchronize time across a network. NTP is an Internet time protocol that includes the discipline algorithms necessary for synchronizing clocks (Microsoft Docs). Step 1: …

[ad_1] Are you looking for an easy way to setup a local OpenShift 4 Cluster in your Laptop?. The Red Hat CodeReady Containers enables you to run a minimal OpenShift 4.2 or newer cluster on your local laptop or desktop computer. This should only be used for development and testing …

[ad_1] I am a new user of CentOS Linux 8 operating system. How do I install htop on CentOS 8 using the yum command? htop is nothing but an interactive process viewer for CentOS Linux 8 system. It is just like default top command with an additional set of options …

[ad_1] Introduction “What is done wholeheartedly however small, is noble” If you would wish to share the same FQDN such as api.computingforgeeks.com to serve more than one site or to serve APIs, then this will help you. If you have two sites hosted on different servers in your environment for …

[ad_1] I am running file /usr/sbin/arp command on a Debian VM minimal but getting an error that read as:bash: file: command not foundHow do I fix this error on a Debian or Ubuntu Linux system? How can I install file command on Linux cloud? Introduction: The file command determines file …

[ad_1] How do I extract filename and extension in the Bash shell script from the given path? How can I get filename from the path under the bash shell? It is possible to get just the filename from a path in a bash shell script running on a Linux or …

[ad_1] I need to find and return the PID of the last command executed in Linux. How do I return the PID of command in Linux? One can easily find the PID of the last executed command in shell script or bash. This page explains how to get the PID …

[ad_1] How can I install Podman on CentOS 8 / RHEL 8 Linux machine?. RHEL 8 / CentOS 8 has dropped official support for Docker as container runtime. Instead, Red Hat has been working on libpod (Podman’s container management library) which provides a library for applications to use the Container …

[ad_1] In this guide I’ll walk you through simple steps to create a Wi-Fi Hotspot on Ubuntu / Debian / Fedora / CentOS / Arch Linux machine using nmcli command line network management tool. I prefer this method as there are many Desktop environments as are many Linux distributions. The …

[ad_1] Introduction This guide will walk you through the steps you’ll require to configure BIND DNS server on CentOS 8 / RHEL 8 Linux – Master / Slave Bind DNS Setup on CentOS 8 / RHEL 8. The Domain Name System is a hierarchical and decentralized naming system for computers, …

[ad_1] How can I configure System wide proxy settings on CentOS 8/7 or Fedora 31/30/29 or RHEL 8/7 Linux machine?. Our guide will discuss how you can configure access to internet via proxy server on a Linux machine. This will include the use of wget, lynx, or curl utilities from …

[ad_1] When developing Java EE/Jakarta EE projects, you know you will need a Java server. Some of the most used Java Enterprise servers include Apache Tomcat, Glassfish, Jetty and WildFly/JBoss server. Not all these server provides all needed features but all of them provide most of the enterprise features needed. …

[ad_1] How can I save / download Live Stream Videos from YouTube, Dailymotion, UStream, Twitch, Livestream?. Streamlink is a CLI utility that pipes flash videos from online streaming services to a variety of video players such as VLC, mpv, MPlayer e.t.c. It was designed to convert CPU-heavy flash plugins to …

[ad_1] draw.io is an online diagramming web application designed for production-grade deployment, with full security process. You can use the freely accessible website of draw.io, or run draw.io locally using the official Docker image or use the Desktop versions for macOS, Linux and Windows. In this guide we’ll install Desktop …

[ad_1] Introduction In case you wanted to pull a container from Docker registry and experienced the error: “Error response from daemon: Get https://registry-1.docker.io/v2/: x509: certificate signed by unknown authority“, then we hope this guide will help you resolve the problem. We assume you have SSL Certificates ready because this will …

[ad_1] This guide will discuss how you can automate your oVirt / RHEV VM creation with Terraform. It is not just the creation of VMs that you can use terraform for, but provisioning of other resources such as Disk, Network, Snapshots e.t.c. In our previous article, we discussed how you …

[ad_1] Welcome to today’s guide which covers how to install OpenProject Community edition on Debian 10 (Buster) Linux. OpenProject is a powerful project management and support tool for companies of all sizes – small to large teams. Features of OpenProject Project planning and scheduling Product roadmap and release planning Task …

[ad_1] Fedora 31 has been released and is available now for installation on both Desktop and Servers. The question is how can I upgrade Fedora 30 to Fedora 31?. To enjoy the latest features available in Fedora 31, an upgrade or fresh installation is required. Most will prefer to do …

[ad_1] Welcome to out guide on how to install Icinga 2 on CentOS 8 / RHEL 8 with Icinga Web 2. Icinga 2 is a free and open source monitoring tool designed to be scalable and extensible Icinga 2 checks the availability of your network resources, notifies users of outages, …

[ad_1] Introduction With CentOS 8 within reach now, it is time to make maximum use of it in running precious and important services in your organization or lab. Here, we are going to install and configure iSCSI Target and Initiator on CentOS 8 / RHEL 8 Linux server. The set …

[ad_1] Introduction As promised, this is a continuation of the iSCSI Target guide setup. In our previous tutorial, we covered the installation of iSCSI Target on CentOS 8 / RHEL 8. This guide for focus on the configuraion of iSCSI Initiator on CentOS 8/RHEL 8. Step 1: Install iscsi-initiator-utils on …

[ad_1] The Dynamic volume provisioning in Kubernetes allows storage volumes to be created on-demand, without manual Administrator intervention. When developers are doing deployments without dynamic provisioning, cluster administrators have to manually make calls to their cloud or storage provider to create new storage volumes, from where the PersistentVolumes are created. …

[ad_1] A volume is a logical collection of bricks. Most of the Gluster Storage management operations happen on the volume. For those new to GlusterFS, a brick is a basic unit of storage. Brick is represented by an export directory on a server in the trusted storage pool. In this …

[ad_1] This guide will guide you to install Adobe Flash Player on Kali Linux and Debian Linux system. Adobe Flash Player is a Lightweight plug-in for browsers used for viewing multimedia and for streaming video and audio content on the Adobe Flash sites and platforms. Adobe Flash Player is used …

[ad_1] I am a new user of Amazon Linux AMI operating system. How do I install htop on Amazon Linux AMI using the yum command? htop is nothing but Interactive process viewer for Amazon Linux AMI based system. It is just like default top command with an additional set of …

[ad_1] Google Chrome is the most popular open source web browser developed by Google. It runs on Linux, Windows, macOS, iOS, and Android. In this post, we will show you how to easily install Google Chrome on CentOS / Fedora Linux. This is the same process used to install Google …

[ad_1] In this guide, we will cover installation of Webmin on Ubuntu 18.04 / Ubuntu 16.04 / Debian 9 / Debian 8 and latest Kali Linux release. Webmin is the leading web-based Linux/Unix system administration Toolkit. Webmin works on all Linux platforms. With webmin, you can set up user accounts, …

[ad_1] Hello guys!, we are going look at How to Install PHPMyAdmin in Kali Linux and Debian. It works same for Ubuntu, Debian distros, Linux Mint, Kubuntu and all Debian like operating systems.If you have a new installed Kali Linux system read our tutorial on Top Ten Must Do Things …