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Programming Leftovers

Submitted by Roy Schestowitz on Friday 30th of April 2021 11:12:03 AM Filed under
Development

  • Remi Collet: PHP version 7.3.28 ,7.4.18 and 8.0.5

    RPMs of PHP version 8.0.5 are available in remi-php80 repository for Fedora 32-34 and Enterprise Linux (RHEL, CentOS).

    RPMs of PHP version 7.4.18 are available in remi repository for Fedora 32-34 and remi-php74 repository Enterprise Linux (RHEL, CentOS).

    RPMs of PHP version 7.3.28 are available in remi-php73 repository for Enterprise Linux (RHEL, CentOS).

  • Multi-thread and Data Race Basics in C++ – Linux Hint

    A process is a program that is running on the computer. In modern computers, many processes run at the same time. A program can be broken down into sub-processes for the sub-processes to run at the same time. These sub-processes are called threads. Threads must run as parts of one program.

    Some programs require more than one input simultaneously. Such a program needs threads. If threads run in parallel, then the overall speed of the program is increased. Threads also share data among themselves. This data sharing leads to conflicts on which result is valid and when the result is valid. This conflict is a data race and can be resolved.

  • How to iterate over the map in C++ – Linux Hint

    In this quick tutorial, we will see how to iterate over in map in C++.
    There are multiple ways to iterate over the map in C++. With newer versions of C++, there are more advanced ways to iterate over the map in C++.

  • How to Use Open System Call in C – Linux Hint

    The system calls are used in the Linux distributions to provide a doorway within the Linux OS and the programs. The Linux operating system uses the Glibc library to support system calls in it while using the C language. There are a lot more ways to use system calls as well. In this article guide, we will be discussing the open system call in the Linux system. The “Open” system call has been used to open the file specified in the path quickly. It let us know about the file descriptor of a user-created file. We have been using Ubuntu 20.04 to get some hands-on “Open” system call.

  • Detecting memory management bugs with GCC 11, Part 1: Understanding dynamic allocation

    Memory management bugs are among the hardest to find in C and C++ programs, and are a favorite target of exploits. These errors are difficult to debug because they involve three distinct sites in a program that are often far apart and obscured by the use of pointers: memory allocation, the use of the allocated memory, and the release of memory back to the system by deallocation. In this two-part article, we’ll look at GNU Compiler Collection (GCC) 11 enhancements that help detect the subset of these bugs that affect dynamically allocated memory. The enhancements discussed here have been made to the GCC core. Related improvements to the GCC static analyzer are covered by David Malcolm in his article Static analysis updates in GCC 11.

    Throughout this article, I include links to the code examples on Compiler Explorer for those who would like to experiment. You will find the links above the source code of each example.

  • The GDB developer’s GNU Debugger tutorial, Part 1: Getting started with the debugger

    This article is the first in a series demonstrating how to use the GNU Debugger (GDB) effectively to debug applications in C and C++. If you have limited or no experience using GDB, this series will teach you how to debug your code more efficiently. If you are already a seasoned professional using GDB, perhaps you will discover something you haven’t seen before.

    In addition to providing developer tips and tricks for many GDB commands, future articles will also cover topics such as debugging optimized code, offline debugging (core files), and server-based sessions (aka gdbserver, used in container debugging).

  • How Rust makes Rayon's data parallelism magical - Red Hat Developer

    Rayon is a data parallelism library for the Rust programming language. Common reactions from programmers who start to use Rayon express how it seems magical: “I changed one line and my code now runs in parallel!” As one of Rayon’s authors, I am of course glad to see happy users, but I want to dispel some of the magic and give credit where it’s due—to Rust itself.

  • Nested Loop in Bash Script Examples – Linux Hint

    In programming or scripting, the loop is one of the most basic and powerful concepts. A loop is performing certain tasks until the specified conditions are met. Each programming or scripting language has different ways of implementing the concept.

    In this guide, check out the nested loop in bash scripting.

»

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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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