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Top 20 Best Linux Mail Server Software and Solutions in 2019

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Server
Software

The E-mail has proved to be the fastest and reliable communication medium of our time. From businesses to individuals, we all rely on e-mails due to the convenience they offer. If you ever wondered how computers send these seemingly simple messages over the network, then follow us through this guide. At the heart of e-mail communication, there are mainly two software components, namely the mail server and mail client. The mail server is responsible for transmitting e-mails from node to node on a network, typically the Internet. And the client allows users in retrieving these mails. In this guide, we’ll solely focus on Linux mail server. Check out our another guide to learn more about various Linux mail clients.

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Review: FreedomBox 2019-07-10 "Buster"

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Server
Reviews

FreedomBox is the most recent distribution to be added to the DistroWatch database. What is FreedomBox? According to the project's website:
FreedomBox is designed to be your own inexpensive server at home. It runs free software and offers an increasing number of services ranging from a calendar or Jabber server to a wiki or VPN. Our web interface allows you to easily install and configure your apps.
On the technical side, FreedomBox is based on Debian. The latest version is based on Debian 10 "Buster". Unlike some Debian projects, FreedomBox is a "pure blend" which means all the packages it uses, or develops, can be found in the Debian repositories. This keeps FreedomBox close to upstream and completely compatible with Debian.

FreedomBox can be purchased bundled with hardware running an ARM CPU or downloaded as a compressed disk image to be installed on existing hardware. The distribution has disk images that run on 32-bit (x86), 64-bit (x86_64) and several flavours of ARM-powered boards. These flavours are available in Stable, Testing and Daily branches, depending if we want a fixed or rolling release operating system. I decided to try the Stable version for 64-bit machines.

The 64-bit image file is a 386MB download which unpacks to 3.8GB when uncompressed. This image file can be written to an SD card or USB thumb drive. By default, FreedomBox runs from the thumb drive or SD card rather than having a typical install process where packages are written to a hard drive. People who wish to perform a customized hard drive install can install Debian first and then add the FreedomBox software on top with a few commands.

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Peter Bengtsson: How much faster is Redis at storing a blob of JSON compared to PostgreSQL?

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Graphics/Benchmarks
Server
OSS

First of all, I'm still a PostgreSQL fan-boy and have no intention of ceasing that. These times are made up of much more than just the individual databases. For example, the PostgreSQL speeds depend on the Django ORM code that makes the SQL and sends the query and then turns it into the model instance. I don't know what the proportions are between that and the actual bytes-from-PG's-disk times. But I'm not sure I care either. The tooling around the database is inevitable mostly and it's what matters to users.

Both Redis and PostgreSQL are persistent and survive server restarts and crashes etc. And you get so many more "batch related" features with PostgreSQL if you need them, such as being able to get a list of the last 10 rows added for some post-processing batch job.

I'm currently using Django's cache framework, with Redis as its backend, and it's a cache framework. It's not meant to be a persistent database. I like the idea that if I really have to I can just flush the cache and although detrimental to performance (temporarily) it shouldn't be a disaster. So I think what I'll do is store these JSON blobs in both databases. Yes, it means roughly 6GB of SSD storage but it also potentially means loading a LOT more into RAM on my limited server. That extra RAM usage pretty much sums of this whole blog post; of course it's faster if you can rely on RAM instead of disk. Now I just need to figure out how RAM I can afford myself for this piece and whether it's worth it.

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Server: Proxmox, KubeVirt and Containers

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Server
  • VMware vSphere vs Proxmox: Which is best for your business?

    Choosing a virtualisation tool can be tricky, so we've put two of the most popular side by side
    Customers are faced with a host of considerations when it comes to trying to decide on what virtualisation and containerisation software to use, and the differences between vendors are not always clear.

    In order to better inform buyers, we've decided to take a look at two of the best-known software packages out there, Proxmox and VMware vSphere, and break down what it is they do and how they may benefit your business.

  • KubeVirt Joins Cloud Native Computing Foundation

    This month the Cloud Native Computing Foundation (CNCF) formally adopted KubeVirt into the CNCF Sandbox. KubeVirt allows you to provision, manage and run virtual machines from and within Kubernetes. In joining the CNCF Sandbox, KubeVirt now has a more substantial platform to grow as well as educate the CNCF community on the use cases for placing virtual machines within Kubernetes. The CNCF onboards projects into the CNCF Sandbox when they warrant experimentation on neutral ground to promote and foster collaborative development.

    For our part, Red Hat has been a contributor and advocate for KubeVirt and we’ve been leveraging it to play with some technologies you may remember. At Red Hat Summit you watched us demonstrate the capabilities of a Kubernetes Native platform bringing together the capabilities of VMs, containers, networking and storage. If you’re an OpenShift customer you may have started to play with Container-native virtualization (CNV), available via tech preview — this uses KubeVirt under the hood.

  • Software Development, Microservices & Container Management – Part II – Why Containers and Cloud Native Application Platform?

    Lots of the developers, Solution Architects and Business Owners have doubts for Virtualization versus Containers and Cloud Native Application Platform; lots of questions are being discussed based on such doubts; Are containers and PaaS replacing Virtual Machines? What are the benefits Containers and Cloud Native Application Platform over a VM offering?

Server: Openwashing, Containous and Red Hat

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Server
  • Are ground systems about to have an open source moment?

    Bogdan compared the open architecture configuration to an iPhone. While the iPhone software is designed by Apple, it’s built so that non-Apple companies can build hundreds of apps that users can pick and choose from to install onto the platform. Similarly, DoD’s ground systems need to be built with a common framework that multiple vendors can design applications for.

  • Containous releases Traefik 2.0 open source edge router

    With the movement toward cloud-native application deployment, there has been a corresponding need for cloud-native networking technology. One of the most successful efforts in the space comes from startup Containous, with its open source Traefik edge router technology.

    Traefik 2.0 became generally available on Sept. 17, providing users with new TCP routing support and an improved API to help direct traffic in cloud-native deployments, including the Kubernetes container orchestration platform. The new Traefik release builds on the experience the company has gained through its large user base. According to Containous, it has had over 1 billion downloads of Traefik from the Docker Hub repository for container applications.

  • Boosting banks’ customer experience with operational efficiency

    The way banking is being conducted around the world is changing, especially with customers who are always connected through mobile phones and with 5G not far away in many places.

    Coupling that with the rising levels of wage growth entrepreneurship and government policies for financial inclusion, banking's traditional customer journeys and distribution models won’t scale nor reach the average consumer, and will be significantly cost-prohibitive for the average bank to service. The idea that a consumer needs to visit a branch doesn’t even come into their equation.

    Moreover, the consumption of banking products from FinTechs, including unsecured lending, peer-to-peer payments, merchant payments, and business credit, is on the rise. Providers like Ascend Money and Rakuten are fast, simple and digital-first. Simply put, they engender customer satisfaction.  

UCS 4.4-2: Second Point Release

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Server

Looking back at the first point release (UCS 4.4-1 in June 2019), our REST API for the Univention Directory Manager was still in beta stadium. Good news: the interface for accessing the directory service is stable now. The API connects applications to the UCS directory service; access is granted via a web service using HTTPS, and data is exchanged JSON format. So, the REST API offers the same functionality as the udm command line tool.
For example, it simplifies the maintenance of user properties or computer objects from connected systems. Developers of applications offered in the Univention App Center also benefit from the new, standardized access because they are no longer limited to the UDM Python interface. The REST API of the Univention Directory Manager is by default activated on all UCS 4.4-2 DC Master and DC Backup instances.

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The Apache Software Foundation Announces Apache Rya as a Top-Level Project

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Server
OSS

The Apache Software Foundation (ASF), the all-volunteer developers, stewards, and incubators of more than 350 Open Source projects and initiatives, announced today Apache® Rya™ as a Top-Level Project (TLP).

Apache Rya (pronounced "ree-uh") is a Cloud-based Big Data triple store (subject-predicate-object) database used to process queries in milliseconds. The project was originally developed at the Laboratory for Telecommunication Sciences, and was submitted to the Apache Incubator in September 2015.

"We are very excited to reach this important milestone showing the maturity of the project and of the community around it," said Dr. Adina Crainiceanu, Vice President of Apache Rya and Associate Professor of Computer Science at the U.S. Naval Academy. "RDF (Resource Description Framework) triple data format is simple and flexible, making it easy to express diverse datasets such as connections between users on social media, financial data and transactions, medical data, and many others. Rya provides a scalable solution to store and query such data. The publication of the first research article about Rya garnered interest from industry, academia, and several government agencies. Bringing the project to ASF allowed collaboration and increased pace of development."

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Also: Apache Promotes Rya To Being A Top-Level Project

Databases: Percona and InfluxDB

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Server
OSS

Server: Kubernetes and So-Called 'DevOps'

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Server
  • Kubernetes Project Releases Version 1.16

    SUSE, and the SUSE CaaS Platform team in particular, congratulates the Kubernetes Project of the Cloud Native Computing Foundation on the release of Kubernetes 1.16.
    The most major change in this release is actually a feature that is already in widespread use. Custom Resource Definitions (CRD) are a major foundation of Kubernetes extensibility and are used by many features and projects; however, they have been in beta since version 1.7, over two years ago. They finally graduate to general availability (GA) and stable status in this release, meaning that anyone using the current version of the feature and its API can expect compatibility for any future 1.x release as well as any 2.x release yet to come.

  • The use of open source software in DevOps has become strategic for organizations of all sizes

    A higher percentage of top performing teams in enterprise organizations are using open source software, according to a survey conducted by DevOps Research and Assessment (DORA) and Google Cloud. Additionally, the proportion of Elite performers (highest performing teams) nearly tripled from last year, showing that DevOps capabilities are driving performance.

  • Kubernetes 1.16 Offers New Promise for IPv6 Cloud Native Deployments

    Kubernetes, for the un-initiated is a container orchestration platform that is deployed and supported in all the major public cloud provides and is also widely used on-premises as well. Every new Kubernetes update has features that are in alpha, beta and those that have reached general availability. In the 1.16 update, for networking professionals there is one alpha feature that stands above all others : IPv4/IPv6 dual-stack.

    "If you enable IPv4/IPv6 dual-stack networking for your Kubernetes cluster, the cluster will support the simultaneous assignment of both IPv4 and IPv6 addresses," the Kubernetes feature documentationstates.

    The dual stack will support both Kubernetes Pods, which represent a set of running containers; as well as Kubernetes Services, which provide a way to abstract an application running on a set of Pods as a network service. The Kubernetes Enhancement Proposal (KEP) that defines the dual-stack feature, notes that Kubernetes has provides support for IPv6-only clusters as alpha features since the Kubernetes 1.9release which debuted in December 2017.

  • No, Kubernetes is Not the New OpenStack, Says Canonical

    It’s easy to think of Kubernetes as the great disruptor of earlier generations of cloud-native platforms, such as OpenStack. But that view would be just as wrong as assuming that Kubernetes and containers have totally killed off old-school virtual machines. That’s what Stephan Fabel of Canonical had to say in an interview about the past, present and future of Kubernetes and other cloud-native technologies within the enterprise.

    [...]

    As a result of these differences, Fabel says OpenStack and Kubernetes each serve distinct types of workloads. For example, OpenStack might appeal to telcos, which are “more prone to adopting configuration management type approaches, where workloads have to be stateful and long-running.” Kubernetes, meanwhile, is better-suited for workloads that are deployed as REST- or HTTP-based services.

    To help prove his point about the continued relevance of OpenStack, Fabel says Canonical is on track to witness “the most commercial activity in OpenStack” ever in the coming quarter, with business coming from a variety of verticals. Clearly, Fabel says, OpenStack remains a go-to solution for enterprises of many different stripes.

Server: Kubernetes/OpenShift, OpenStack, and Red Hat's Ansible

Filed under
Red Hat
Server
  • 9 steps to awesome with Kubernetes/OpenShift presented by Burr Sutter

    Burr Sutter gave a terrific talk in India in July, where he laid out the terms, systems and processes needed to setup Kubernetes for developers. This is an introductory presentation, which may be useful for your larger community of Kubernetes users once you’ve already setup User Provisioned Infrastructure (UPI) in Red Hat OpenShift for them, though it does go into the deeper details of actually running the a cluster. To follow along, Burr created an accompanying GitHub repository, so you too can learn how to setup an awesome Kubernetes cluster in just 9 steps.

  • Weaveworks Named a Top Kubernetes Contributor

    But anyone who knows the history of Weaveworks might not be too surprised by this. Weaveworks has been a major champion of Kubernetes since the very beginning. It might not be too much of a coincidence that Weaveworks was incorporated only a few weeks after Kubernetes was open sourced, five years ago. In addition to this, the very first elected chair of the CNCF’s Technical Oversight Committee, responsible for technical leadership to the Cloud Native Foundation was also headed up by our CEO, Alexis Richardson(@monadic) (soon to be replaced by the awesome Liz Rice (@lizrice) of Aqua Security).

  • Improving trust in the cloud with OpenStack and AMD SEV

    This post contains an exciting announcement, but first I need to provide some context!

    Ever heard that joke “the cloud is just someone else’s computer”?

    Of course it’s a gross over-simplification, but there’s more than a grain of truth in it. And that raises the question: if your applications are running in someone else’s data-centre, how can you trust that they’re not being snooped upon, or worse, invasively tampered with?

  • Red Hat OpenStack Platform 15 Enhances Infrastructure Security and Cloud-Native Integration Across the Open Hybrid Cloud

    Red Hat, Inc., the world's leading provider of open source solutions, today announced the general availability of Red Hat OpenStack Platform 15, the latest version of its highly scalable and agile cloud Infrastructure-as-a-Service (IaaS) solution. Based on the OpenStack community’s "Stein" release, Red Hat OpenStack Platform 15 adds performance and cloud security enhancements and expands the platform’s ecosystem of supported hardware, helping IT organizations to more quickly and more securely support demanding production workloads. Given the role of Linux as the foundation for hybrid cloud, customers can also benefit from a more secure, flexible and intelligent Linux operating system underpinning their private cloud deployments with Red Hat Enterprise Linux 8.

  • Red Hat Ansible Automation Accelerates Past Major Adoption Milestone, Now Manages More Than Four Million Customer Systems Worldwide

    Red Hat, Inc., the world's leading provider of open source solutions, today announced that more than four million customer systems worldwide are now automated by Red Hat Ansible Automation. Customers, including Energy Market Company, Microsoft, Reserve Bank of New Zealand and Surescripts all use Red Hat Ansible Automation to automate and orchestrate their IT operations, helping to expand automation across IT stacks.

    According to a blog post by Chris Gardner with Forrester Research, who was the author of The Forrester Wave™: Infrastructure Automation Platforms, Q3 2019, "Infrastructure automation isn’t just on-premises or the cloud. It’s at the edge and everywhere in between."1 Since its launch in 2013, Red Hat Ansible Automation has provided a single tool to help organizations automate across IT operations and development, including infrastructure, networks, cloud, security and beyond.

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Here are the 5 Lightweight Linux Distributions We Recommend

Linux is quite good in that it offers a lot of options for almost any use case. A lot of you may have an old desktop or laptop thrown in some dark corners of your house, but did you know that you can fully renew it with Linux? Here are some lightweight Linux distributions that we recommend for the task. A lot of other people and websites may recommend a totally different set of lightweight distributions for you, but in our selection, we didn’t just care for resources usage and the distro’s ability to work on old hardware. Instead, we also cared for the ease of use and your ability as a user to deal with the distribution on daily basis to do your tasks. At the end, the goal is not simply to get an old computer to just work – the goal is to get an old computer to work and do things that you need as someone living in 2020. Read more

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Canonical Announces Ubuntu AWS Rolling Linux Kernel for Ubuntu 18.04 LTS AMIs

Until now, the Ubuntu images for AWS (Amazon Web Services) have been using a normal Linux kernel that was updated whenever a new security update was available. With the new rolling model, the kernel in the Ubuntu AWS images gets all the latest fixes, performance tweaks, and security patches from upstream, as soon as they are available. "The Ubuntu rolling kernel model provides the latest upstream bug fixes and performance improvements around task scheduling, I/O scheduling, networking, hypervisor guests and containers to our users," said Canonical. "Canonical has been following this model in other cloud environments for some time now, and have found it to be an excellent way to deliver these benefits while continuing to provide LTS level stability." Read more Direct: Introducing the Ubuntu AWS Rolling Kernel

Getting started with the GNOME Linux desktop

The GNOME project is the Linux desktop's darling, and deservedly so. It began as the free and open desktop alternative to proprietary options (including KDE at the time), and it's been going strong ever since. GNOME took GTK+, developed by the GIMP project, and ran with it, developing it into a robust, all-purpose GTK framework. The project has pioneered the user interface, challenging preconceptions of what a desktop "should" look like and offering users new paradigms and options. GNOME is widely available as the default desktop on most of the major modern Linux distributions, including RHEL, Fedora, Debian, and Ubuntu. If your distribution doesn't offer a version of it, you can probably install GNOME from your software repository. Before you do, though, be aware that it is meant to provide a full desktop experience, so many GNOME apps are installed along with the desktop. If you're already running a different desktop, you may find yourself with redundant applications (two PDF readers, two media players, two file managers, and so on). If you just want to try the GNOME desktop, consider installing a GNOME distribution in a virtual machine, such as GNOME Boxes. Read more