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Programming: R, GNU Bash, Python and More

Submitted by Roy Schestowitz on Thursday 28th of March 2019 02:14:26 PM Filed under
Development
  • Third and Final (?) Post on Stripping R Libraries

    Back in August of 2017, we wrote two posts #9: Compating your Share Libraries and #10: Compacting your Shared Libraries, After The Build about “stripping” shared libraries. This involves removing auxiliary information (such as debug symbols and more) from the shared libraries which can greatly reduce the installed size (on suitable platforms – it mostly matters where I work, i.e. on Linux).

  • Command-Line – New Commands

    The more basic a command is, the more likely it is to predate Linux. The long history of commands is an advantage in that core commands have had more than four decades to get the bugs out and to make revisions as the expectations and needs of Linux users have evolved. However, more options can also make mastering commands more difficult. At times, all the revisions can make learning and remembering commands absolutely cumbersome.

  • PyCon China 2018: In-Depth Analysis of Mars

    We shared our latest project, Mars, a matrix-based unified computing framework, at the main venue of the PyCon China 2018 conference in Beijing, as well as at its sub-venues in Chengdu and Hangzhou. This article explains the shared content at the PyCon China 2018 conference in the form of text.

    For those who have never heard of Mars, you may wonder what Mars is, what Mars can do, and how Mars work. Today, we answer these questions from the experience with Mars and by using an example.

  • Mars – Matrix-based Universal Distributed Computing Framework

    We are pleased to announce our new project, Mars, which is a matrix-based universal distributed computing framework. The open source code of Mars is already available in GitHub: https://github.com/mars-project/mars .

  • Mars – Alibaba's Open Source Distributed Scientific Computing Engine

    Recently, Alibaba officially published the open source code for its distributed scientific computing engine – Mars. Developers can download and install Mars from PyPI or obtain the source code from GitHub and participate in the development.

    Alibaba announced this open source project as early as September 2018 at the Computing Conference held in Yunqi, Hangzhou. Mars is different from existing big data computing engines, of which the computing models are mainly based on relational algebra. Mars introduces distributed technologies into the scientific computing/numerical computation field and significantly improves the computing scale and efficiency of scientific computing. Currently Mars has been applied to both business and production scenarios at Alibaba or for its customers on the cloud. This article elaborates on the design objectives and technical architecture of Mars.

  • Water Python
  • Gimp image optimization with Python plugins

    Performing the same Gimp image processing steps again and again is tiresome and error prone. Mike Schilli assigns this task to a Python script via a home grown new menu entry.

    Today's cellphone cameras record images in giant formats that are hardly suitable for blogging or sending through narrow data pipes. I tend to scale all of these photos down to 2000x1000 pixels, maybe sharpen them a bit, and perform white balancing on each one. The Gimp image editor has been my tool of choice for many years, but it would be nice if it would help me out by performing these repetitive steps automatically.

  • Montréal-Python 74: Virtual Echo

    We will meet up at Shopify for the first Montreal Python of the year. We will start with 4 most interesting presentations, and then we will move up to Benelux to continue the discussion.

  • Tutorials – Shell Scripting

    Often, the real decision-making challenge lies not in figuring out whether your shell script needs a while loop or some nested if statements but rather in determining the conditions that will tell your script when it should stop that loop or which branch of that "if" statement to execute. The main Bash tools for this purpose are a big set of test operators (see the descriptions online [2] [3] [4]) and their corresponding syntax, which can evaluate whether some condition is true or false. By contrast, exit status codes [5] are the traces that built-in commands, or whole scripts, leave behind to communicate their achievements.

  • 17 Practical Python Tuples Examples

    Tuple is similar to List in python language, both are sequential, index based data structure.

    The main difference between tuples and list is that tuples are immutable i.e. we cannot modify a tuple’s content but List is mutable data structure. Also, tuples uses parenthesis and list uses square brackets.

»

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. 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 the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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