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Programming Leftovers

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  • C++ Inheritance

    Inheritance is a very important feature of object-oriented programming. It allows the programmer to derive a class from an existing class. This is very useful especially in a large complex project because it allows the programmer to re-use the code.

    In this article, we are going to discuss the inheritance concept in C++ programming. We will explain the concept of the friend function in C++ with working examples.


  • NanoVMs Puts Legacy Vendors on Notice with Latest APM Offering

    NanoVMs Radar allows full tracing, debugging and performance monitoring that is specifically built for unikernel based workloads. NanoVMs Radar makes debugging server-side applications even easier than debugging on Linux systems.

    Unikernels have the geek world on fire as they run cloud and traditional datacenter workloads faster, safer and with far less complexity. The trick? Isolating each application to one small, secure nanovm.


  • What problems do people solve with strace?

    Yesterday I asked on Twitter about what problems people are solving with strace and as usual everyone really delivered! I got 200 answers and then spent a bunch of time manually categorizing them into 9 categories of problems.

    All of the problems are about either finding files a program depends on, figuring out why a program is stuck or slow, or finding out why a program is failing. These generally matched up with what I use strace for myself, but there were some things I hadn’t thought of too!

    I’m not going to explain what strace is in this post but I have a free zine about it and a talk and lots of blog posts.

  • How to Access SQLite from Python

    Python is a popular and robust programming language rich in features that make it usable in a wide range of cases like data science, networking, IT automation, penetration testing, and many more. It also has a simple syntax that allows developers who know other programming languages to adapt to using Python with ease.

    Data is everywhere, and a wide range of software applications interact with data using a Database Management System. SQLite is one of the most popular database management systems in Python.

    SQLite is a simple, powerful, open-source, and relational database engine that supports large software applications and embedded systems. SQLite is standalone and requires minimal configuration, making it extra easy to set up and run with minimal time. By default, Python comes built-in with an SQLite module (sqlite3), a very intuitive module for working with SQLite databases in Python.

    In this tutorial, we will look at how to use Python to work with SQLite databases. From establishing a connection to creating databases, reading databases, updating, and removing databases.

  • How to Check if a File Exists in Bash?

    In Linux, everything is saved in a file. To check if a file exists and if it’s a standard one, use the test command with the -f option. Similarly, using the test command with the -d operator helps you to see if a file or directory exists.

    In this guide, we will learn how to use a Bash script to check if a file or directory exists.

  • How to use plugins for ZSH – Linux Hint

    I think we can all agree that the shell is the one thing we all have in common as Unix/Linux geeks. Whether you are a system admin, DevOps, Hardware, or Penetration testing, you will have to use the terminal to accomplish your tasks.

    In today’s tutorial, I want to show you how to install ZSH, make it the default shell and install the oh-my-zsh framework to customize and add more functionality to your shell using plugins.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

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.