Programming and Administration

• Exception Handling in Java | Explained

  Java provides a concept of Exception Handling that makes it possible to handle the errors at run time, in this way, the normal follow of the program wouldn’t be affected. To handle the runtime exceptions Java provides multiple ways such as try-catch, finally, throw, throws. The normal flow can be preserved using any of these exception handling methods.

• Statistics Module in Python

  If you’re in the research world, statistics is of paramount importance! And Python offers many a module for statistics, but the one that we’ll be talking about today is called the statistics module. It’s a simple module, not really for advanced statistics but for those who just need a simple and quick computation. In this tutorial, we’ll be reviewing the statistics module in Python.

• Emulate the Do-While Loop in Python

  Most of the standard programming languages have three types of loops to iterate some statement multiple times. These are the while loop, for loop, and the do-while loop. The while and for loop are available in Python but Python has no do-while loop. The do-while loop can be implemented by using another loop. In the do-while loop, the condition is tested after inserting the loop. So, the statements of the do-loop execute at least once even if the condition may not be matched. The ways of emulating the do-while loop in Python have been shown in this tutorial.

• [Old] “The Canary in the Coal Mine…” A cautionary tale from the decline of SourceForge

  This article tells the cautionary tale of the downfall of Allura/SourceForge. We identified both internal and external causes, both social and technical in nature. We also found evidence of sociotechnical and architectural problems in project archives. Project and community health metrics could have been used to predict and understand the downfall by tracking its early manifestations. The team reported to be aware of the technical debt in the project, yet this was insufficient to maintain the health of the project. Community managers should also measure and manage the mutual impacts of technical and social debt. Furthermore, our analysis suggests that a combination of managerial and technical flaws doomed this project: architectural flaws, power-distance, and measurable management mishaps eventually led to the forge's demise. Practitioners and maintainers of other software projects can benefit from this cautionary tale, for example, as indications of what not to do, in the scope of their community and architecture management infrastructure.

• Dirk Eddelbuettel: RcppArmadillo 0.11.1.1.0 on CRAN: Updates

  Armadillo is a powerful and expressive C++ template library for linear algebra and scientific computing. It aims towards a good balance between speed and ease of use, has syntax deliberately close to Matlab and is useful for algorithm development directly in C++, or quick conversion of research code into production environments. RcppArmadillo integrates this library with the R environment and language–and is widely used by (currently) 978 other packages on CRAN, downloaded over 24 million times (per the partial logs from the cloud mirrors of CRAN), and the CSDA paper (preprint / vignette) by Conrad and myself has been cited 469 times according to Google Scholar. This release brings a first new upstream fix in the new release series 11.*. In particular, treatment of ill-conditioned matrices is further strengthened. We once again tested this very rigorously via three different RC releases each of which got a full reverse-dependencies run (for which results are always logged here). A minor issue with old g++ compilers was found once 11.1.0 was tagged to this upstream release is now 11.1.1. Also fixed is an OpenMP setup issue where Justin Silverman noticed that we did not propagate the -fopenmp setting correctly.

• Reversed Linked List (C++)

  When you reverse a linked list, the link path is reversed, and the head becomes the tail, and the tail becomes the head. By swapping the positions of the nodes, we can understand this quickly. In this swapping, we just change the positions of the nodes from left to right or vice-versa.

• Gets Function in C

  Bound-checking is therefore not accomplished by the gets() method. It would not examine if the input data integrates inside the character array’s holding limit of bytes. A buffer overflow can occur when an entry exceeds the array limit. Through fgets, this restriction of the gets() method could be eliminated. The gets() method produces a string if it occurs. It reverts NULL if it starts to fail. It displays the EOF indicator on a string if an end-of-file situation generates the error. If another error triggers the failure, the error parameter is displayed on the string.

• Getting started with Node-Red on Raspberry Pi

  Node-Red is a visual programming tool that is used to connect APIs and hardware in a more prominent and exciting way. It has a web-based editor that will allow you to control and manage your Raspberry Pi device from a remote location. The graphical user interface of the editor is excellent and pretty simple which enables a beginner to handle it quite easily. The Node-Red can easily be installed on your Raspberry Pi device and once the installation is completed you will need to acquire a basic understanding of how to use this tool on a web editor to develop different projects. In this tutorial, we will provide you with an easy setup guide to get started with Node-Red on your Raspberry Pi and start developing your projects with ease.

• Impact Analysis for UTF-8 in the RIPE Database

  The RIPE Database contains the names and addresses of organisations as well as administrative and technical contacts for resources and routing in the RIPE region. The Database currently supports the Latin-1 (ISO-8859-1) character set, which can represent most characters in western European languages. However it cannot fully support characters used in other languages and alphabets that are commonly used in the RIPE service region and beyond. Currently, any unsupported characters must be transliterated into Latin-1 (or even ASCII in some cases, which is a subset of Latin-1), potentially corrupting the meaning. Switching the RIPE Database from Latin-1 to UTF-8 allows names and addresses to be properly represented for querying and display.

• Kubernetes 1.24: Volume Populators Graduate to Beta | Kubernetes

  The volume populators feature is now two releases old and entering beta! The AnyVolumeDataSouce feature gate defaults to enabled in Kubernetes v1.24, which means that users can specify any custom resource as the data source of a PVC.

  An earlier blog article detailed how the volume populators feature works. In short, a cluster administrator can install a CRD and associated populator controller in the cluster, and any user who can create instances of the CR can create pre-populated volumes by taking advantage of the populator.

  Multiple populators can be installed side by side for different purposes. The SIG storage community is already seeing some implementations in public, and more prototypes should appear soon.

Videos/Shows: Free Sofwtare Security, LINUX Unplugged on NVIDIA, GNU World Order, and More

• Josh Bressers: Episode 323 – The fake 7-Zip vulnerability and SBOM

  Josh and Kurt talk about a fake 7-Zip security report. It’s pretty clear that everyone is running open source all the time. We end on some thoughts around what SBOM is good for, and who should be responsible for them.

• NVIDIA’s New View | LINUX Unplugged 458

  NVIDIA is open-sourcing their GPU drivers, but there are a few things you need to know. Plus, we get some exclusive insights into Tailscale from one of its co-founders. Special Guests: Avery Pennarun and Christian F.K. Schaller.

• GNU World Order 460

  **kapidox** , **kapman** , **kapptemplate** , **karchive** , and **kate** from the **kde** software series of Slackware.

• Systeroid: Best Way To Set Linux Kernel Parameters - Invidious

  It's not often you need to mess with kernel parameters but when you do instead of using sysctl how about you try out systeroid instead

today's howtos

• 5 Things to Do After Upgrading to Ubuntu 22.04 LTS

• How to Dual Boot Ubuntu 22.04 LTS and Windows 11

  Hey guys, in this guide we will demonstrate how to configure a dual-boot setup of Ubuntu 22.04 LTS (Jammy Jellyfish) alongside Windows 11.

  For this to work, you need to have Windows 11 already installed on your PC.  You will then need to create a separate partition on your hard drive on which Ubuntu 22.04 will be installed. We will go over all this, so don’t worry.

• Using SSH Keys

  SSH supports authenticating users with keys. Although they require more setup ahead of time, they’re generally more secure than typing in passwords. They’re also more convenient in the long run. In this article, I am going to cover using key-based authentication in OpenSSH.

• How To Install Anaconda on Ubuntu 22.04

  Anaconda is a distribution of the Python and R programming languages for scientific computing (data science, machine learning applications, large-scale data processing, predictive analytics, etc.), that aims to simplify package management and deployment. The distribution includes data-science packages suitable for Windows, Linux, and macOS. It is developed and maintained by Anaconda, Inc.,

• How To Install Anaconda on Fedora 36

  Anaconda is a popular Python/R data science and machine learning platform, used for large-scale data processing, predictive analytics, and scientific computing. Anaconda distribution ships with 250 open-source data packages, and more than 7,500 additional packages can be installed from the Anaconda repositories. It also includes the conda command-line tool and a desktop graphical user interface called Anaconda Navigator.

• How to install Brave Web browser on CentOS 9 Stream

  Hello, friends. In this post, you will learn how to install Brave Web browser on CentOS 9 Stream. This is one of the best alternative web browsers you can use.

• Install phpMyAdmin on Ubuntu 22.04 with Apache

  phpMyAdmin is a web-based application for interacting with MySQL database server. This tool provides you with a user interface to make MySQL operations so you don’t have to use the command line interface. In this guide you are going to learn how to install phpMyAdmin with Apache on Ubuntu 22.04 and secure it.

• How to Install GNU Octave on Linux Mint 20

  Linux Mint is an ideal operating system for many kinds of users, such as enthusiasts and developers. That’s why it has become one of the most popular in all of Linux, thanks to its ease of use and robustness. In it, we can install all kinds of tools such as programming languages and thus be useful to professional developers. An example of this is that we can install GNU Octave on Linux Mint without too many problems. This is the aim of our post.