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Software

5 Best Ubuntu Screen Recorders for Every User

Filed under
Software
Ubuntu

Tools like screen recorders are not used by normal computer users but there is a particular set of users whose work heavily relies on screen recorders such as professional YouTube Creators who make many video tutorials, gaming and software reviews, How-to guides and for professional gamers who like to go online while playing their favorite game.
There can be plenty reasons apart from these to use screen recorders and there are many really good and reliable screen recorders are available on internet for Linux and Ubuntu users. But finding the best is tough task because output video file is what matters the most and not every screen recorder gives you output file in the screen resolution, frame rate and quality you prefer.

Linux and its distributions come with built-in screenshot tool out-of-the-box but screen recording tool is always missing. So today we’re going to give you in-depth guide to best screen recorders which you can find very useful on Linux and its distro’s like Ubuntu.

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Calibre Open-Source eBook Management App Gets Major Release After Two Years

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Software
OSS

Believe it or not, it's been two years since the Calibre 3.0 series was introduced, and now, the time has come for fans of the best free ebook management software to get a brand-new release that introduces new technologies and new features, along with dozens of improvements.

"It has been two years since Calibre 3.0. This time has been spent mostly in making the calibre Content server ever more capable as well as migrating calibre itself from Qt WebKit to Qt WebEngine, because the former is no longer maintained," said developer Kovid Goyal.

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Also: New in calibre 4.0

Oracle demands $12K from network biz that doesn't use its software

Filed under
GNU
Linux
Software
Legal

Merula Limited, a UK-based network service provider, recently received a bill from Oracle for $12,200 for using the company's proprietary VirtualBox Extension Pack, which provides extra capabilities for the free GPL-licensed VirtualBox hypervisor.

For Richard Palmer, director of the company, this was a perplexing demand. As he explained to The Register, "Merula does not operate or manage any computer using VirtualBox or any Oracle software."

Oracle provided the company with a range of IP addresses, more than 100, that it claimed had been using its proprietary VirtualBox Extension Pack in conjunction with VirtualBox installations.

It's claimed that Oracle's software phones home to report where it's being used, though the company may be repurposing VirtualBox telemetry for its audits. Or it may simply be checking the IP addresses associated with downloads of the software and contacting address registrants to seek payment.

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Excellent Utilities: Ananicy – auto nice daemon

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Software

This is a new series highlighting best-of-breed utilities. We’ll be covering a wide range of utilities including tools that boost your productivity, help you manage your workflow, and lots more besides. There’s a complete list of the tools in this series in the Summary section.

It’s possible to grant more importance to a process, giving it more time on the CPU. This property of a process is called niceness. A process with high priority is said to be less nice because it’s taking more of the CPU’s time, which leaves less for everything else. Alternatively, a process with low priority (a “nice” process) gets processor time only after other processes with higher priority have been serviced.

Prioritize applications’ CPU and IO scheduling is a good way to improve performance on what really matters. This can be actioned per command with nice and ionice commands, but there’s a better way. Ananicy is a shell daemon created to manage processes’ IO and CPU priorities, with community-driven set of rules for popular applications.

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Krita 4.2.7 Released

Filed under
KDE
Software

Today, we’re releasing the sixth bug fix release of Krita 4.2. As discussed in our development update, we intend to release a few more monthly 4.2 bug fix releases before releasing Krita 4.3. There are a lot of bug fixes!

And to celebrate the release, we have a new video by Ramon Miranda which comes with a very nice present: a free new bundle of six sketching brush presets!

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Also: Fall Season

Software: Samba and GnuTLS, Cockpit Release

Filed under
Software
  • Samba and GnuTLS

    More or less since the beginning of Samba, it implemented the cryptography it needed to talk to Windows on its own. One reason is that Windows didn’t follow the standards or used ciphers nobody else really used. This is changing right now!

    GnuTLS already was a used by Samba if available and it is a requirement if you build the Samba AD with MIT Kerberos already. So to get out of the crypto business we decided to use GnuTLS as our crypto library.

    With Samba 4.11 we did the first step using GnuTLS and required GnuTLS 3.2. With Samba 4.12 the requirement will be at least GnuTLS 3.4.7. The reason is that we require AEAD for AES-CCM and AES-GCM and 3.4.7 is already the requirement if building Samba AD with MIT Kerberos. This allowed us also to delete a lot of code!

  • Samba 4.12 Bringing Much Faster Encryption Performance With GnuTLS

    Samba 4.11 was just released a few weeks back with big scalability improvements, but looking ahead to Samba 4.12 will be some big performance improvements for those leveraging encryption.

    Samba 4.12 for SMB3 file transfers with encryption will be an order of 4~6 times faster than current performance levels! This is coming as Samba is beginning to properly leverage GnuTLS rather than historically implementing its own crypto methods.

  • Cockpit Project: Cockpit 204

    Cockpit is the modern Linux admin interface. We release regularly. Here are the release notes from version 204.

Cawbird is a GTK Twitter Client for Linux (That Should Look Very Familiar)

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Software

The Corebird Twitter client for Linux was one of my favourite desktop apps so I was pretty bummed when Twitter API changes effectively put the app out of action last year.

But nothing is ever really “gone” in open source, is it?

And lo, the soul of Corebird (its code) lives on in the regenerated form of Cawbird, a Corebird fork with big ambitions for the future.

In this post we take a look at Cawbird, how it differs from Corebird, and how you can install it in Ubuntu to try it out for yourself.

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Cairo Dock review - The dock is in the detail

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Software
Reviews

Cairo Dock is feature-rich, no scratch that, feature-ultra-rich dock software that allows you to adorn your desktop with any number of docks, however custom and fancy you like, replete with their own individual behavior, animations, themes, icons, and applets. Not for the weak or the impatient. But it surely does more than pretty much any other dock program out there. Very cool.

And yet, therein lies its weakness. Most people, if they need a dock, only want something simple and elegant. They want consistent behavior and pleasant, integrated theming. When it comes to using an Xfce desktop that has a dock-like behavior, Cairo provides the best (and only viable results), but it's also super-complicated and there are some outstanding visual issues that you just can't work around easily. In general, Cairo does wonders, it's a really mighty dock tool, but it's perhaps too powerful for its own good. Still, I think it's definitely worth using and testing, and I hope it will remain around, and maybe even get some fresh, modern themes. We're done.

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Top 20 Best Linux Mail Server Software and Solutions in 2019

Filed under
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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The monumental impact of C

Filed under
Development
Software

C is the original general-purpose programming language. The Season 3 finale of the Command Line Heroes podcast explores C's origin story in a way that showcases the longevity and power of its design. It's a perfect synthesis of all the languages discussed throughout the podcast's third season and this series of articles.

C is such a fundamental language that many of us forget how much it has changed. Technically a "high-level language," in the sense that it requires a compiler to be runnable, it's as close to assembly language as people like to get these days (outside of specialized, low-memory environments). It's also considered to be the language that made nearly all languages that came after it possible.

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More in Tux Machines

Canonical Outs New Linux Kernel Security Update for Ubuntu 18.04 and 16.04 LTS

Affecting both the Linux 4.15 kernel used in Ubuntu 18.04 LTS (Bionic Beaver) and Ubuntu 16.04.6 LTS (Xenial Xerus) systems, the new security patch fixed an improperly implemented Spectre mitigation in the ptrace susbsystem (CVE-2019-15902), which could allow a local attacker to expose sensitive information. It also addresses a buffer overread (CVE-2019-15918) discovered that the SMB networking file system implementation, which could allow an attacker to expose sensitive information (kernel memory), two flaws (CVE-2019-15117 and CVE-2019-15118) discovered in the USB audio driver that may allow a physically proximate attacker to crash the system, and a flaw (CVE-2019-14821) in the KVM hypervisor implementation that let a local attacker to crash the system. Read more

Leftovers: MX-19, Versalogic and Security

  • MX-19 “patito feo” released!

    We are pleased to offer MX-19 for your use. As usual, this iso includes the latest updates from debian 10.1 (buster), antiX and MX repos.

  • Compact Apollo Lake SBC aims sky high

    Versalogic’s Linux-ready, sandwich-style “Harrier” SBC has an Apollo Lake processor and a compact 95 x 55mm footprint, ECC RAM support, and ruggedization features designed for high altitude UAVs. Versalogic announced a Harrier SBC due in Q1 2020 that revises the compact, COM-and-carrier design of its three-year-old, Intel Bay Trail based Osprey, but advances to the newer Intel Apollo Lake. The Osprey is similarly bereft of real-world ports to enable easier real-world deployments in constrained environments.

  • Security updates for Tuesday

    Security updates have been issued by CentOS (jss and kernel), Debian (libpcap, openjdk-8, and tcpdump), Fedora (java-11-openjdk), openSUSE (libreoffice), Oracle (java-1.7.0-openjdk), Red Hat (java-1.7.0-openjdk, python, and wget), Scientific Linux (java-1.7.0-openjdk), SUSE (ceph, ceph-iscsi, ses-manual_en, dhcp, openconnect, and procps), and Ubuntu (exiv2, linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2, linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon, linux-hwe, linux-azure, linux-gcp, linux-gke-5.0, linux-snapdragon, and uw-imap).

  • Password lessons: Longer is better, so is salt

    Infosec pros who had no idea of how easily a stolen list of hashed passwords could be cracked got a sobering lesson at this month’s SecTor security conference in Toronto. There, Will Hunt, co-founder of the U.K. based In.security consulting firm, casually talked of systems that can be built around a common (about $1,500) Nvidea GTX 2080 graphics card that could make 100 billion guesses a second in a brute force attack.

Unix Celebrates 50 Years

Today and tomorrow Nokia Bell Labs is hosting a two-day event celebrating 50 years of the Unix operating system, reflecting on Unix’s past and exploring the future of computing. Speakers and panelists include many of the original team that built Unix and designed the C programming language. Read more

Red Hat Leftovers

  • How we brought JavaScript to life for Command Line Heroes

    Animators within Red Hat?s Open Studio help bring Command Line Heroes? artwork more to life. All throughout Season 3, they?ve added movement to our episode pages and created eye-catching trailers for social and Red Hat?s YouTube channel. This post highlights their important contributions to the Command Line Heroes? creative process by looking at their work for Episode 3 of Season 4: Creating JavaScript. Also, designer Karen Crowson talks about the easter eggs in that episode?s artwork.

  • Red Hat Ceph Storage RGW deployment strategies and sizing guidance

    Starting in Red Hat Ceph Storage 3.0, Red Hat added support for Containerized Storage Daemons (CSD) which allows the software-defined storage components (Ceph MON, OSD, MGR, RGW, etc) to run within containers. CSD avoids the need to have dedicated nodes for storage services thus reducing both CAPEX and OPEX by co-located storage containerized daemons. Ceph-Ansible provides the required mechanism to put resource fencing to each storage container which is useful for running multiple storage daemon containers on one physical node. In this blog post, we will cover strategies to deploy RGW containers and their resource sizing guidance. Before we dive into the performance, let's understand what are the different ways to deploy RGW.

  • OpenShift 4.2: New YAML Editor

    Through our built-in YAML editor, users can create and edit resources right in the Red Hat OpenShift Web Console UI. In the latest release, we’ve upgraded our editor to include language server support. What is language server support? The language server support feature uses the OpenAPI schema from Kubernetes to provide content assist inside the YAML editor based on the type of resource you are editing. More specifically, the language server support offers the following capabilities: Improved YAML validation: The new editor provides feedback in context, directing you to the exact line and position that requires attention. Document outlining: Document outlines offer a quick way to navigate your code. Auto completion: While in the editor, language server support will provide you with valid configuration information as you type, allowing you to edit faster. Hover support: Hovering over a property will show a description of the associated schema. Advanced formatting: Format your YAML.