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Sci/Tech

Chemtool: Open-source Chemical Structure drawing program

Filed under
Software
Sci/Tech

Chemtool is a lightweight application for drawing chemical structures like organic molecules. It's originally written by Thomas Volk from Germany. Later on, more developers came to aid for development and code maintenance.

[...]

The program is created for Linux X systems, it does not work on Windows or macOS.

License

Chemtool is released under GNU General Public License.

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Stellarium 0.20.3 Released with Tons of Changes [Ubuntu PPA]

Filed under
Software
Sci/Tech
SciFi

Free-software planetarium Stellarium 0.20.3 was released a day ago with numerous changes. Here’s how to install it in Ubuntu 18.04, Ubuntu 20.04 via PPA.

Stellarium 0.20.3 fixed nutation and, with it, season beginning times, included many changes in AstroCalc tool, Oculars and Satellites plugins, and updated DSO catalog.

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LabPlot 2.8 Released

Filed under
KDE
Software
Sci/Tech

In 2.8 we made it easier to access many online resources that provide data sets for educational purposes. These data sets cover a variety of different areas, such as physics, statistics, medicine, etc., and are usually organized in collections.

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“It Just Works”: An Interview with Dexai Robotics

Filed under
Linux
Interviews
Sci/Tech

The simulators wind up using a lot of computational power, which is one of the reasons why we use System76. Portability is another. I really like the fact that I can run the full software stack on a laptop that I can always have with me. Previously, we had desktops sitting around in a lab environment, and people were often having to sign into them and borrow them. We needed a solution for new hires to have a computer they can rely on at all times.

A co-worker mentioned that she bought a machine from you guys back in 2019. After she recommended it, I did a little bit of digging online for the best Linux laptops available, and you all were named a fair amount in those searches—so I ordered one. I was pleasantly surprised with how it just worked right out of the box. I wasn’t fiddling with drivers, I wasn’t dealing with bootloader problems and figuring out how to get a working desktop environment up; I just opened it up and installed a bunch of software and I was ready to go.

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CAELinux 2020: Linux for engineering

Filed under
GNU
Linux
Sci/Tech

CAELinux is a distribution focused on computer-aided engineering (CAE) maintained by Joël Cugnoni. Designed with students and academics in mind, the distribution is loaded with open-source software that can be used to model everything from pig livers to airfoils. Cugnoni's latest release, CAELinux 2020, was made on August 11; readers with engineering interests may want to take a look.

CAELinux's first stable version was released in 2007 and was based on PCLinuxOS 2007. The distribution was created to make the GPL-licensed finite element analysis tool Salome-Meca easier to obtain. CAELinux 2020 is now the eighth release of the distribution, which is based on Xubuntu 18.04 LTS, and has expanded its focus over the years into an impressive array of open-source CAE-related tools.

The minimum requirements for CAELinux 2020 are a x86-64 platform with 4GB of RAM for "simple analysis." For professional use, the project recommends 8GB of RAM or more with a "modern AMD/NVidia graphic card." The entire distribution can be run from an 8GB USB memory drive, with the option to install it to disk (35GB minimum). For those users (like me) who wanted to run the distribution as a virtual machine, the project recommends the commercial VMware Player over the open-source VirtualBox project due to "some graphical limitations" of VirtualBox.

There are too many different software packages unique to the CAELinux distribution to cover them all in a single article. Since the distribution is built on top of Xubuntu, CAELinux comes with all of the standard tools available in the base distribution. In addition to the standard packages, however, CAELinux bundles CAE pre/post processors, CAD and CAM software, finite element solvers, computational fluid dynamics applications, circuit board design tools, biomedical image processing software, and a large array of programming language packages. A review of the release announcement provides a full list of the specific open-source projects available, including a few web-based tools that merely launch the included browser to the appropriate URL.

It would be impossible for me to claim familiarity with the full range of tools provided, but I was familiar with many. For example, FreeCAD has been written about at LWN, and CAMLab was used in our article on open-source CNC manufacturing. I have personally used other bundled packages like FlatCAM for isolation routing of homemade circuit boards and Cura to slice 3D models for printing. What was particularly neat about exploring the distribution was getting introduced to new open-source software that matched my interests. I discovered KiCad EDA's PCB Calculator utility (simple, but handy), and I am looking forward to checking out CAMotics as another CAM alternative for my CNC router.

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Cantor 20.08

Filed under
KDE
Sci/Tech

Our developers are adding some usability improvements to Cantor and some initial results from GSoC projects are now available with the 20.08 release.

For example, now you can collapse, uncollapse, and remove all results from the worksheet; exclude entries from the worksheet commands processing; add actions for selected texts; zoom widgets; get tooltips for almost all settings options; use the new horizontal rule entry; and more.

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Cantor - File Browser Panel

Filed under
KDE
Sci/Tech

this is the fourth post about the progress in my GSoC project and I want to present some user experience improvements related to the handling of panels in Cantor and to present a new panel "File Browser" that I implemented recently.

The status of Cantor's panels was not saved when the user closed the application. Potential rearangements and size changes done on panels were gone and the user had to do the changes again upon the next start. Very bad UX, of course. Now, the state is saved and even more, the state is saved for every backend in Cantor. So, if you have a Python session in Cantor, open some panels and arrange them at your will, close and reopen Cantor with a Python session again - the previous state of the panels appears on start.

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Also: GSoC ’ 20 Progress: Week 5 and 6

scikit-survival 0.13 Released

Filed under
Software
GNOME
Sci/Tech

Today, I released version 0.13.0 of scikit-survival. Most notably, this release adds sksurv.metrics.brier_score and sksurv.metrics.integrated_brier_score, an updated PEP 517/518 compatible build system, and support for scikit-learn 0.23.

For a full list of changes in scikit-survival 0.13.0, please see the release notes.

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What Operating System Is the Best Choice for Software Engineers?

Filed under
OS
Development
GNU
Linux
Sci/Tech

GNU/Linux is, hands down, the most highly acclaimed operating system for software engineering. It comes with an absolute ton of development tools and has unprecedented performance with regard to software development.

Linux, in case you are not aware, is a free, open-licensed operating system. This means that it is very developer-friendly and can be, to a certain extent, customized to your own desires.

But, it is not for everyone.

Linux comes with a large selection of distributions (called distros in the trade). Each one, unsurprisingly, has the Linux Kernel at its core, with other components built on top. Many Linux users will tend to switch between these distros until they find the perfect 'recipe' for their needs and tastes.

We will highlight a few of these towards the end of the article.

What are some of the pros of using Linux for software development?

1. One of the main benefits of Linux, not to mention the Linux ecosystem, according to software engineers, is the amount of choice and flexibility it provides. This really does make it the jewel in the crown of operating systems.

2. Linux is free and open-sourced. This means you don't have to fork out tons of cash on licenses for the OS and other apps used on it.

3. It is easy to install directly on your computer, or you can boot Linux from an external drive like a USB flash drive or CD. You can also install it with or inside Windows if you need both.

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Stellarium 0.20.2 Released as 20 Year Anniversary Celebration

Filed under
Software
Sci/Tech

Free open-source astronomy software Stellarium 0.20.2 was released a few days ago as the 20 year anniversary celebration.

Stellarium 0.20.2 contains many changes in AstroCalc tool and core of Stellarium, changes in scripting engline and Script Console, Oculars and Satellites plugins, updated DSO catalog, see release note for details.

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More in Tux Machines

Kernel and Graphics: Intel, AMD, and NVIDIA

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    Intel has teased a new tech it calls "Software Defined Silicon" (SDSi) but is saying almost nothing about it – and has told The Register it could amount to nothing. SDSi popped up around three weeks ago in a post to the Linux Kernel mailing list, in which an Intel Linux software engineer named David Box described it as "a post-manufacturing mechanism for activating additional silicon features".

  • RadeonSI Lands Another "Very Large" Optimization To Further Boost SPECViewPerf - Phoronix

    In recent months we have seen a lot of RadeonSI optimizations focused on SPECViewPerf with AMD seemingly trying to get this open-source OpenGL driver into very capable shape moving forward for workstation GL workloads. Hitting Mesa 22.0-devel today is yet another round of patches for tuning SPECViewPerf.

  • Vendors Including NVIDIA Talk Up New OpenCL Extensions For Vulkan Interop, NN Inference - Phoronix

    Last Friday night we spotted OpenCL 3.0.9 with several new extensions included. Today The Khronos Group is formally announcing these latest OpenCL additions focused on Vulkan interoperability as well as neural network inferencing. These new extensions for OpenCL 3.0 include an integer dot product extension for neural network inferencing (cl_khr_integer_dot_product) with a focus on 8-bit integer support.

  • RadeonSI Enables NGG Shader Culling For Navi 1x Consumer GPUs - Phoronix

    As another possible performance win for RadeonSI Gallium3D as AMD's open-source Radeon OpenGL driver on Linux systems is enabling of NGG culling for Navi 1x consumer graphics processors rather than limiting it only to newer Navi 2x (RDNA2) GPUs. Merged on Monday was a patch to enable shader culling for Navi 1x consumer SKUs with no longer limiting it to Navi 2x / GFX10.3 or when using various debug options. This culling was also enabled for Navi 1x GPUs but only for the "Pro" graphics SKUs.

Databases: Managing Database Migrations, PostgreSQL-Related Releases

KDE Plasma 5.18.8, Bugfix Release for October

Plasma 5.18 was released in February 2020 with many feature refinements and new modules to complete the desktop experience. Read more

today's howtos

  • Speak to me! – Purism

    My trusty laptop’s speakers gave up the ghost. I don’t like to sit around in headphones all the time, I don’t have any other speakers, and the replacements are still being manhandled by the postman. I’d get used to the austerity if I hadn’t started missing calls from a friend. That’s unacceptable! But what am I supposed to do? Buy extra gadgets just to throw them away after a week? Nope, I’m not that kind of a person. But hey – I have a Librem 5! It has a speaker. It’s open. I have control over it, and I’m a hacker too. So I should be able to come up with a hack to turn it into a speaker for my laptop, right? Pulseaudio to the rescue. I look through the guide. There it is: forwarding audio over a network.

  • How To Install CSF Firewall on Debian 11 - idroot

    In this tutorial, we will show you how to install CSF Firewall on Debian 11. For those of you who didn’t know, CSF is also known as “Config Server Firewall” is a free and advanced firewall for Linux systems. We should use ConfigServer Security & Firewall (CSF) since this CSF have more advanced and comprehensive features than other firewall application such as UFW, Firewalld, or Iptables. Compared to the other Linux firewall application, CSF is more user-friendly and effective which is mostly used by web hosting providers. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of the ConfigServer Security & Firewall (CSF) on a Debian 11 (Bullseye).

  • What are the differences between SQL and MySQL | FOSS Linux

    Due to many organizations, businesses, companies, and firms making an online presence, databases have become the core requirement for their daily operations. A database in a layman’s language is defined as a collection of data stored and organized electronically to ensure easy retrieval, access, management, and manipulation of business data. Most business successes depend on databases since they aid in storing essential and relevant data in a central position. Besides, databases also help facilitate communication of crucial business info such as employee profiles, sales transactions, customer profiles, marketing campaigns, product inventory, etc. Furthermore, databases have ensured that the company’s data is secure through various authentication mechanisms like access specifiers, user logins, and sign-ups. This article will talk about the difference between the two popular relational databases SQL and MySQL.

  • How to install Funkin' Psych Engine on a Chromebook

    Today we are looking at how to install Friday Night Funkin' Psych Engine on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • How to Use an SSH Key with Non-root Users - Unixcop

    You can SSH to your Linux instance as root with the key. However, the key doesn’t work for non-root users. So we will illustrate two methods to use SSH keys with non-root users.

  • Allow Port Through Firewall in Ubuntu 20.04 - Linux Nightly

    Ubuntu comes with ufw (uncomplicated firewall) installed by default. This is a frontend for iptables/nftables, the built-in Linux firewall, and is meant to make firewall management a bit easier. In this guide, you’ll see how to add rules to the firewall to open ports and allow certain services to have access through the firewall on Ubuntu.

  • Some regex tests with grep, sed and AWK

    In my data work I regularly do searching and filtering with GNU grep (version 3.3), GNU sed (4.7) and GNU AWK (4.2.1). I don't know if they all use the same regex engine, but I've noticed differences in regex speed between these three programs. This post documents some of the differences.

  • Upgrade to Fedora 35 from Fedora 34 using DNF – If Not True Then False

    This is guide, howto upgrade Fedora 34 to Fedora 35 using DNF. This method works on desktop and server machines. You can also upgrade older Fedora installations (example Fedora 33/32/31/30) directly to Fedora 35. I have tested this method on several machines, but if you have problems, please let me know. Always remember backup, before upgrade!

  • Jenkins: Basic security settings - Anto ./ Online

    Jenkins contains sensitive information. Thus it must be secured, like any other sensitive platform. Thankfully Jenkins provides you with many security options. This guide will show you all the essential bits that you need to know. You access these features on the Configure Global Security page under manage Jenkins.

  • LDAP query from Python · Pablo Iranzo Gómez's blog

    Recently, some colleagues commented about validating if users in a Telegram group were or not employees anymore, so that the process could be automated without having to chase down the users that left the company. One of the fields that can be configured by each user, is the link to other platforms (Github, LinkedIn, Twitter, Telegram, etc), so querying an LDAP server could suffice to get the list of users. First, we need to get some data required, in our case, we do anonymous binding to our LDAP server and the field to search for containing the ‘other platform’ links.