Linux

Great Reads

Create a VPN killswitch with UFW

by Manjunath Matathamana

Implement a VPN killswitch that will stop all internet traffic when your VPN goes down

General security issues in organizations.

by Kamal Mahendra Sirisena

The article discuss general security issues in organizations by considering some common security components.

.NET Core: Compile Once, Run Everywhere

by Kornfeld Eliyahu Peter

PoC - a small trip to see how .NET Core IS multiplatform

.NET-like Reflection Support for Enums in C++

by ZhaoRuFei

This article provides a macro + template solution to support .NET-like Reflection for enums such as ToString, IsDefined, Parse, GetValues, GetNames.

Latest Articles

Create a VPN killswitch with UFW

by Manjunath Matathamana

Implement a VPN killswitch that will stop all internet traffic when your VPN goes down

General security issues in organizations.

by Kamal Mahendra Sirisena

The article discuss general security issues in organizations by considering some common security components.

.NET Core: Compile Once, Run Everywhere

by Kornfeld Eliyahu Peter

PoC - a small trip to see how .NET Core IS multiplatform

.NET-like Reflection Support for Enums in C++

by ZhaoRuFei

This article provides a macro + template solution to support .NET-like Reflection for enums such as ToString, IsDefined, Parse, GetValues, GetNames.

All Articles

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Linux

A General C++ Reflection Engine Based on C++11 and Meta Programming

by JohnX2015

This is a cross-platform general C++ engine, including a general runtime and a reflection engine.

A Light-weight, Thread Safe Properties Class for C++ Embedded Projects

by Tim ONeil

INI-style properties for C++ Embedded/Applications on Linux

A Polygon-triangulation Algorithm with Time Complexity O(N*logN)

by Mathew_wwx

This tip will introduce a library written in C++ that wraps up a 2d polygon triangulation algorithm with time complexity of O(N*logN), the algorithm works on both self-intersected and non self-intersected polygons.

A Progress Indicator for the Boost Test Library

by cocaf

How to show progress in a Boost test application.

A simple hashing class

by charles henington

This is an alternative for "Send Mail With Attachment File"

A Unique Singleton

by osy

Proper implementation of a signal handler

Add Clipboard Text Consumer Capability to Your C# OpenGL App on X11

by Steffen Ploetz

How to realize text past functionality via inter process communication for your OpenTK based C# OpenGL application running on X11

Add Clipboard Text Provider Capability to Your C# OpenGL App on X11

by Steffen Ploetz

How to realize text copy functionality via inter process communication for your OpenTK based C# OpenGL application running on X11

Adding new documents to a collection in Mongodb

by ColdskyXia

How to add new documents to a collection more efficiently

Amazon AWS: EC2 FTP server using S3 as the backend

by John Duquette

How-to setup an FTP server on an EC2 instance using S3 for storage

An elegant command line options parser

by Liu Junfeng

A simple and powerful command line options parser.

Anonymity on the Internet

by Kamal Mahendra Sirisena

Online Anonymity for Penetration Testing

Apply a custom default style on QML controls

by Marco Bertschi

A short guide on how you can style and customize the appearance of you QML controls in a CSS-like way

Approach to Implement Modal Windows for OpenGL/OpenTK in MONO/.NET for Serious Applications

by Steffen Ploetz

How to implement modal windows with OpenTK on Linux, that behave like dialog boxes on Windows

ASP.NET 5 and Ubuntu

by Hugo Carnicelli

During this article, we are going to explore what is currently necessary to run an ASP.NET 5 website on Ubuntu.

Automating backup for MongoDB using CRON and S3CMD

by Lazaro Lima

This paper attempts to pass all the steps to create an automated backup for a MongoDB Server on a Linux Server where all backups are sent to Amazon AWS S3 service scheduled through crontab.

Build Your Own SDN Network

by JinWenQiang

Get started with your own SDN (Software Defined Network) simulation network

C# .NET Interoperability with Native C Libraries on Cross Platform : PART I

by deepi2014

This tip is to showcase how to write “Native C Library” so that it can be used for Cross Platform with .NET interoperability with Native C Libraries.

C#.NET Interoperability with Native C Libraries on Cross Platform: PART II

by deepi2014

An attempt to taking up an existing published article “C#.NET Interoperability with Native C Libraries on Cross Platform” towards the next level.

C++ function to convert a date time value into different date formats

by Ritesh_Singh

A function which returns date in different formats base on the input given

C++ Header to Plot vector as 2D Graphs and Arrays as Potential Line Maps to SVG Files

by gintack

C++ header file to plot data in the form of x, y, z arrays and list as potential lines and graphs

Challenges in Migrating ASP.NET Apps to Containers #1 – Multiple Active Result Sets

by Mohammad Elsheimy

One of the major issues encountered when connecting to databases after porting ASP.NET app to Docker Linux containers.

Challenges in Migrating ASP.NET Apps to Containers #3 – OpenSSL Issues

by Mohammad Elsheimy

Configuring OpenSSL minimum version and legacy renogetiation

Composition for Partial Aggregate Domain Model

by Dominique Gilleman

How to handle (load/save) only a part of an aggregate domain model with composition

Console simple progress

by aaverian

A very simple console progress bar.

Copy a GL Texture to Another GL Texture or to a GL Pixel Buffer and from a GL Pixel Buffer

by Steffen Ploetz

How to use GL's pixel buffer object (PBO) to copy one texture to another

Create a JMS Configuration on Oracle Weblogic 11g using WSLT

by Octavio Sanchez Huerta

Python Script using WSLT

Create a Parrot Drone Web Control Panel: Sound On/Off, Lights On/Off

by D4rkTrick

How to create a web control panel for sound and lights for your Parrot drone (Wi-fi connected)

Create a Simple Web Server in Java (1) - HTTP Server

by Andy Feng

Create a simple Http Server using Java SDK and process GET/POST requests

Create a Simple Web Server in Java (2) - HTTPS Server

by Andy Feng

Create a simple and flexible HTTPS server using JDK to process GET/POST requests

Create Multi-language ASP.NET Website

by Ahmed Alaa El-Din

Useful and simple tutorial to create multi-language ASP.NET website. Following these steps, you will be able to create a good user interface multi-language website with 4 main steps.

Creating a Custom wxPython Progress Bar Widget

by freeluna

A simple alternative progress bar or gauge in wxPython

Creating Linux Swap Files Using Python

by Farzan Hajian

This tip describes how to create and delete Linux swap files using a Python script

Creating RazorPage Apps Using the CLI

by Shayne P Boyer

Creating RazorPage apps using the CLI

Cross-browser blink feature

by Vasudevan Deepak Kumar

The Blink Feature in Netscape browsers is really a cool one. Here we would bring in the Blink feature for Microsoft Internet Explorer using a simple JavaScript trick.

Cross-platform Visual Memory Tracker

by araud

Did you ever want to know where most of the memory is consumed? Whether it leaks or just gets allocated too much. This home brew memory tracker is yet another bicycle that you will be able to tune for your needs.

Datepicker directive using AngularJS and Bootstrap

by Chinh Vo Wili

This is simple creating datepicker directive using AngularJs and Bootstrap

Designing the Interface of DLLs in C/C++ Projects

by pasztorpisti

An advice to make your DLL interface more attractive and easier-to-maintain even in cross-platform projects

Developing a TimeUtil Class to Work with Time in Java

by Salar Hafezi

Through this tip, we develop a Java class named TimeUtil to extend Java's built in Date class so we can work with local times in our application.

Different styles for writing Hello World program in the Ring programming language

by Rubin Liu

A quick look around the different styles in the Ring programming language!

Displaying a Bar Chart using SELECT command in Oracle

by Azim Zahir

This tip demonstrates using the Select command to display a bar chart.

Distributed TMTO Hash Database

by Andrew Admire

Create a distributed P2P TMTO Hash database

Docker Contexts: Simplifying Remote Operations

by GabrieleTronchin

The Docker context command simplifies the configuration and switching between contexts.

Docker Private Registry on CentOS

by Member 14151270

Docker Private registry on CentOS

Dynamically Sized Struct

by Orjan Westin

Simplifying the use of dynamically sized C structs

Eggplant tips and ticks

by Mircea Sirghi

The article exposes some useful functions for making Eggplant easier.

Encapsulate a memcache for Texas Hold’em

by skydirve

An article about encapsulating a memcache.

Extend the GNOME 2.x desktop menu

by Steffen Ploetz

How to group applications into user defined menus of the GNOME desktop menu.

Extracting RAW Images from Flir JPEG on Linux

by fernandoc1

This article describes how to extract RAW image information from Thermal Flir JPEG images

Fast base64 functions for encode/decode

by Ștefan-Mihai MOGA

A quick solution to transform binary data to plain text

Faster Image Comparison iJS Algorithm for opencv

by Johnson Augustine

Faster image matching or comparison in large set of categorized images or training set in machine learning

Fibonacci Recursive and Non Recursive C++

by joseph.arul83@gmail.com

Non Recursive and Recursive implementation of Fibonaci series in C++. Emphasis is on the complexity involved in the different implementations.

Fibonacci Recursive and Non Recursive C++

by ostream

A stupid change :) int FibonacciR::Fibonacci(const int &n){ if(n<=1) return n; return Fibonacci(n-1) + Fibonacci(n-2); } :laugh:

Fibonacci Recursive and Non Recursive C++

by Aescleal

If you can, the quickest way to calculate the Fibonacci numbers is to do it at compile time. This is a case of "My recursive method is quicker than yours...":templateclass fibonacci_number{ public: static const T value = fibonacci_number<T, n -...

Fourth Order Runge-Kutta Method in Python

by tyebillion

Implementation of the fourth order Runge-Kutta method in Python for solving n-dimensional ordinary differential equations

Frequency Divider with VHDL

by Carlos A. Ramos

This brief article describes a frequency divider with VHDL along with the process to calculate the scaling factor.

Garbage Collections in Java

by Ramiz Raza

This tip talks about how garbage collection works in Java Virtual Machine.

Gated Check-in in Git Repository

by Rahul R Shanbhag

This tip explains how we can make the Git pipeline fail when the Sonarqube quality gates analysis for the corresponding branch fails.

GCC Cross Compiler Setup in Windows

by Arun Maiya

How to setup GCC cross compiler in Windows to generate Linux binaries

Generating Server Side PDFs using PDFKit and Node.js

by Suroor Wijdan

Generating server side PDFs in 5 minutes with PDFKit and Node.js

Getting Started with mongodb

by ColdskyXia

How to get started with mongodb

GoFlex Repair And Snooping Around

by marcus obrien

Fix your goflex media server files and have poke around on the device.

Great UI (Mark Miller)

by Thiru Thirunavukarasu

Just came across this fantastic series and thought I'd share. Mark Miller is the driving force behind CodeRush. The essense of great UI (an overview)Why is great UI so hard to achieve?Great UI clarity and information relevanceGreat UIs, clarity and emphasisGreat UIs, clarity and info

Hints for Using Poco Project XML Configuration

by Andy Kirkham

The Poco XML Configuration has thrown up a number of (unanswered) questions across the inter-webs. This tip is intended to answer the commonest of them all, how to read multiple tags within an XML container tag

How to Access WAMP Server in LAN or WAN

by Jaiswar Vipin Kumar R.

How to access WAMP Server in LAN or WAN.

How to Compile FFmpeg 6.0 in Linux and What New Things Can Be Done With It

by V. Subhash

How to get compile the latest FFmpeg source code and try out some new features

How to Configure Virtual IP Address (VIP) on CentOS

by Renz Ladroma

This tutorial will guide you on how to configure virtual IP address on your server.

How to Deploy your Java Web Project code to Linux server

by Dinesh Kr. Choudhary

How to deploy your Java Web Project code to a Linux server.

How to Identify if the Executable is 32-bit or 64-bit

by Amit KD

How to identify if the executable is 32-bit or 64-bit

How to Install Let's Encrypt and Automate Renewal in Nginx

by James Johnes

Do you want to secure your nginx server? Do you want to prevent Google Chrome from name shaming your non-SSL domain? Well, here a perfect yet easy to follow guide to help you.

How to Install Windows Forms 2.0 on Mono in Ubuntu 13.10?

by Nelson Kosta Souto

Run .NET Windows forms 2.0 on Ubuntu 13.04

How to Protect from SQL Injection in PhP based website

by chetan dudhagara

How to Protect from SQL Injection in PhP based website

How to Setup a Tomcat Cluster in 5 Minutes

by Andrey Chaschev

Describes how to install and use Bear to set up and manage Tomcat cluster

How to Transfer a MySQL Database between Two Servers using SCP

by Renz Ladroma

A guide to transfer your MySQL databases between two servers using the SCP method

How to Use Proxychains / Forwarding Ports

by Grant Curell

Using proxychains for pivoting through routers and other multi-homed devices

Ideone.com pastebin and online compiler with support for 40 programming languages

by KjellKod.cc

Ideone.com pastebin and online compiler with support for 40 programming languages

Implementation of an Easy, Fast, and Optimized (CByte, CShort, CInt) with Bits Access Using Bit Field and Union

by Ahmed Elkafrawy

Implementation of an easy, fast, and optimized (CByte, CShort, CInt) with bits access using bit field and union

Improving Binary Search Algorithm by Three Boolean Logic

by George Shagov

An idea how to improve the performance of binary search algorithm using three boolean logic

Increase LINQ query perfromance by compiling it

by Pranay Rana

Increase LINQ query perfromance by compiling it

Install SQL Server 15.x on Ubuntu Linux Server 18.04 LTS

by Nabil Droussi

This article will walk you with steps on how to install, configure and connect to SQL Server 15.x on,Linux Ubuntu Server 18.04 LTS

Installing & Configuring Laravel

by fnjauke

Set up laravel 5 and set permissions for the Apache user to write to storage directory

Installing Mongodb in Fedora

by ColdskyXia

Installing Mongodb

Installing Qt on Linux

by Marco Bertschi

A brief step-by-step guide on what is needed to get Qt and the Qt Creator installed on your Linux environment

Integrating Asterisk with External Systems

by Samson Mebrahtu

Asterisk Java integration using fast AGI

Interactive Shortest Route Finder using Openlayers

by Nicholas Gandolfo

Using Openlayers to display interactive nodes and links.

Investigate the Window Manager Shell Window ID

by Steffen Ploetz

Investigate the window manager's shell window ID and additional information of an OpenTK window.

IP/Subnet Calculator Lib

by saddam abu ghaida

IP/Subnet Calculator Lib

Java Performance - length vs length()

by Salar Hafezi

How to optimize heavy String/Array manipulations

jvmtop - An open-source console tool to monitor your JVMs

by Mattias Ordboken

jvmtop is a lightweight, open-source console monitoring tool

Kernel Modules using autoconf

by Tim ONeil

Using the autoconf tool chain to add modules to the Linux kernel

Linux on Windows

by Tiago Cavalcante Trindade

How to use WSL, GUI on WSL and how to compile for Linux on Windows

Linux Platform Device Driver

by Nagaraj Krishnamurthy

This tip will go into the details of platform devices and their corresponding drivers in Linux

Log Harvester

by Adam Wojnar

A complete log viewer written in C++/WTL.

Log4J for Jetty

by shash kant

Configuring Log4J for Jetty

Logging in C++

by Pankaj Choudhary - C++ Devepoler

Logging in C++

lvalue and rvalue Applied for 2-dimension Array Class Definition

by ratah_

This tip discusses about a solution to allow us to use any class as a C-like 2-dimension array.

Making Windows 7 Ultimate POSIX-compatible

by Marco Bertschi

Activating the Windows POSIX Kernel patch and installing the Interix SDK on Windows 7 Ultimate.

ManhattanPlot

by Mr. xieguigang 谢桂纲

Manhattan plot in VisualBasic, application of the cross platform VisualBasic in the data science

Minimalistic C# Application with GLUT Window on Linux

by Steffen Ploetz

How to create an OpenGL (Mesa) window using C#, P/Invoke GLUT, GLU and GL libraries

MongoDB and .NET: Securing your MongoDB data with user authentication

by Peter Carrasco

Most Useful Key Missing? There is a Fix!

by Sergey Alexandrovich Kryukov

Solving the most annoying keyboard problem on Windows and Linux

Mounting a Windows share/shared folder on FreeBSD/FreeNAS

by Mustafa Ismail Mustafa

Mounting a Windows share/shared folder on FreeBSD/FreeNAS

Move all Odd numbers after Even numbers in Singly Linked List

by botman1001

Given a Singly Linked List, we have to modify it such that all Even numbers appear before Odd

MVVM with MVC-Razor and AngularJS Global Controllers

by lakhdarr

Using angularjs global controllers and MVC Razor to divide page (load) rendering between server and browser

MySQL Double Instance Creation and Database Transfer in CentOS

by Nazar.Bukhari

This tutorial will demonstrate the creation of second mysql instance and transfer a database from the first instance to the second.

New ways to try old Unix commands

by jnaze

OpenGL GPGPU 1D Fourier Transform

by Asif Bahrainwala

OpenGL Compute Shader

Parsing XML Tree Containing Heterogeneous Data

by Kiril Shulga

Parsing XML tree containing heterogeneous data using libxml2 Reader API

PHP and Accessing MS SQL Server in Unix/Linux

by C Is Sharp

PHP and Accessing MS SQL Server in Unix/Linux.

PHP Global Variable Alternative

by M@dHatter

A new way to handle globals in php without declaring global identifier.

Plug-in Architecture To Work for Multiple Platforms/Techs

by Reader Man San

Plug-in Architecture To Work in WinForms MVC + WPF MVVM + ASP.NET MVC + Mobile (Xamarin MVC/PhoneGap MVC) + Win 10 Universal App MVC

Plugins: Loading Code at Runtime

by Martin Vorbrodt

Plugins: loading code at runtime

Pre-processor Iteration

by Debdatta Basu

Emulating iterative structures with the C++ pre-processor.

Python Code Optimizations: Part 2

by Dhruv Singh

Follow the tips below to write more beautiful and idiomatic Python code!

Quick Code Language and API Reference Search for Developers

by Michael Safyan

If you've done a regular search for API reference documentation, most likely you've come across links to very old versions of the API (e.g. links to Java 1.4.2 instead of Java 5 or Java 6), or you've probably come across plenty of links that are completely unrelated to the actual search (getting...

Raspberry Pi - SSH Public Key Authentication

by mpolaczyk

Public Key Auth - Why it's better than simple password and how to configure

RaspberryPi2 and Wiring Library

by Member 11246861

First samples in VisualGDB for Raspberry pi2

Reading Compressed LZMA Files on-the-fly using a Custom C++ std::streambuf

by Philipp Sch

How to read compressed LZMA files on-the-fly using a custom C++ std::streambuf

Removing documents from a collection in Mongodb

by ColdskyXia

How to remove documents from a collection more efficiently

Run Debian RISC-V In QEMU: Virtual Environment For Assembly development

by raddevus

After a lot of research, I’ve discovered the simplest way to get a QEMU RISC-V Linux image running.

Running a Windows .NET application on Linux

by Nelson Kosta Souto

Running the same compiled assembly on Windows and Linux.

SASS in Drupal

by Latika surse

How to use SASS in Drupal ?

Sci-Fi Plot Compiler

by steveb

A simple Sci-Fi plot compiler

Selected Web Accessibility Tips

by Voevudko A. E., Ph.D.

Briefly discussing web accessibility in general. Stressing a few prime points/tips that are easy to use and always good to follow. Suggesting to start using easy to understand and remember "rules of thumb".

selection sort with swapping pointers in linked list

by yousafzai amazai

In this article we see how selection sort can be implemented with swapping pointers.

Sending and receiving strings from COM-port via jSSC in Java

by Emiliarge

How to send data to device and receive data from device through COM-port

Serialize/Deserialize any object to an XML file

by akramKamal

Code to serialize/deserialize any object to an XML file.

Session 1: Setup SoftEther L2TP server on Amazon AWS Ubuntu

by WoodyMou

Session 1: Setup SoftEther L2TP server on Amazon AWS Ubuntu

Set for Success

by DigitalInBlue

Guidance on C++/C++!1 Parameter Passing

Simple C genetic algorithm example

by Adrabi Abderrahim

Simple C genetic algorithm example

Simple Enhanced Threading-based PlayStation Controller

by Tareq_Gamal

Multitheading-based Simple way to control a PlayStation Controller with added Events and Naming buttons, and more options

Simplest Way to Use Iron Router in a Meteor App

by B. Clay Shannon

Using routing in Meteor with IronRouter to allow users to navigate between templates/pages

Spiffsgen: A Code Generation Based Workaround for Lack of ESP32 SPIFFS Uploader Tool

by honey the codewitch

This is a very specialized tool that generates source code to upload files into SPIFFS on an ESP32

Start program on double clicking Shell script

by perilbrain

This shows how to start a program by double clicking a shell script in linux environment.

Text to Bag-of-Words with bash

by Andy Allinger

Convert .txt files to .bow in one Linux shell command

The Generic Network Endpoint Class for the Boost's Asio Framework

by cocaf

The generic network endpoint (IP address and port) class that can be compared with and cast to/from the protocol aware boost::asio::ip::udp::endpoint and boost::asio::ip::tcp::endpoint objects.

The Virtual Inheritance and Funny Tricks

by cocaf

The virtual inheritance helps to solve certain class design problems even if they are unrelated to the "deadly diamond of death".

Tiny XML Serializer for C++

by Lothar Perr

Simple and lightweight XML Serialization using tinyxml2

Understand SPA using AngularJS

by Sourav Kayal

In this tip, we will learn to implement SPA using AngularJS

Using getMagicCaretPosition Without Getting Null Value

by Alain Peralta

How to use getMagicCaretPosition without getting null value

Using getopts in shell programming to handle command line arguments

by Gautham Prabhu K

Using getopts in shell scripting to handle command line arguments.

Using JavaServer Faces with Oracle

by Azim Zahir

This article explains creating a JSF application using NetBeans 7.2.1 and Oracle 11G.

Using Mininet-wifi to Simulate Software-Defined-Wireless-Network

by JinWenQiang

Just a brief introduction of a simulator to build wireless environment

Using Posix Message Queue in C#, Mono on Linux

by Uttam Kotdiya -India

This tip demonstrates how to use posix message for Inter Process Communication (IPC) in C#, Mono on Linux

Virtual Screenshot Manager

by csanuragjain

Captures, searches, and manages all your screenshots in one place.

VisualBasic CLI Pipeline

by Mr. xieguigang 谢桂纲

How to use pipeline feature for linux programming

Waterfall for Tracking Any Result Over Time

by Christopher Ayres

Track usage of a value overtime

WCF channelfactory and DataContracts (complex data types) to consume gSoap web services

by Prasad Agarmore

Datacontract channelfactory WCF way of consuming SOAP web services written in C, C++ using gSoap framework on Linux platform

Web Page to PDF or Image

by me.ajaykumar

How to convert a web page to PDF or image

Webix Integration with Online Geographical Maps

by sonic_youth

This tip will tell you how to add popular web maps such as Google, Nokia, OpenStreet and Yandex maps into a Webix app with just several lines of code.

Webservices and Pick

by Mikeqm

Making the web work with Pick

Wordpress, Permalinks & LAMP with 404's

by TrueCodePoet

Fixing mod_rewrite access to .htaccess files for Wordpress "Pretty Permalinks" and 404 errors.

Work around for consistent stack corruption resulting from the same thread

by Andrey Grodzovsky

Stack corruptions are usually tricky to solve, they can be random or consistent in nature, random are usually due to some rogue pointer writing to a random location wrecking havoc along the process address space and the consistent are due to overrunning allocated write buffer with more bytes that it

XOR Hex Strings in Linux Shell Script

by Sanjay1982

Small shell script function to XOR hex strings

YouTube API for PHP

by Prabakaran T

Youtube API for PHP to feed a video list from a particular channel without Oauth, this API only needs a Channel ID and Channel name, no need to generate API key access and so on, simply it's fair enough.