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How to Upgrade Ghost Installation

How to Upgrade Ghost Installation

This guide walks you through upgrading a self-hosted Ghost installation on a VPS or server. Whether you're running on Ubuntu, Debian, or another Linux distribution, these steps will help you safely update Ghost to the latest version while avoiding common pitfalls. Prerequisites Before you begin, ensure you have:

The Mathematics of RSA Encryption

The Mathematics of RSA Encryption

RSA is one of those things that sounds complex until someone explains it with a clear example. Let's break it down step-by-step, with small, human-readable numbers, so it's easy to follow and fun to understand. What is RSA? RSA is a powerful and widely-used asymmetric encryption

How to Reset Ghost Admin Password via Database

How to Reset Ghost Admin Password via Database

When you've lost access to your Ghost admin account and can't use the email-based password reset, you can reset the password directly in the MySQL database. Prerequisites * SSH access to your Ghost server * MySQL database credentials (found in Ghost's config.production.json) * Node.js

How to Forge a JWT with C#

How to Forge a JWT with C#

When running tests on APIs we need to be able to create tokens that have specific characteristics to make sure the API responds correctly to each test scenario. I developed a C# script that allows me to do just that. very simple, it can be improved and more options can

How to generate 256-bit random hex strings in MacOS

How to generate 256-bit random hex strings in MacOS

The command openssl gives us everything we need. If you run openssl rand -hex 32 you will have an output like this: openssl rand -hex 32 fe2b27f8d12cc51729c6fcf43c8316b156eb86d539330ab8eb9b5641a5569df0 But what happens if we need more than one, say 20. We'll need to run seq 20 | xargs -n1 -I{} openssl

Ethernet

Ethernet

What is Ethernet? Ethernet is the most common wired networking technology used in homes, offices, and data centers. It allows computers and other devices to communicate over a local area network (LAN) using cables and standardized protocols. Ethernet Cable Wiring Standards Ethernet cables use twisted pairs of wires to carry

IEEE-754

IEEE-754

Floating Point Made Simple! The IEEE-754 standard defines how computers represent floating point numbers — that is, numbers with decimals like 3.14 or -0.001. It helps ensure that all systems (computers, languages, CPUs) store and calculate with floating point numbers consistently. Why Do We Need IEEE-754? Computers use binary

AES GCM in .NET 8 (.csx script)

AES GCM in .NET 8 (.csx script)

Well, sooner or later, I would need a way to encrypt things, a safe way, therefore here I leave the code for AES GCM string encryption with .NET 8. I assume you already have .NET 8 installed as well as dotnet-script. #!/usr/bin/env dotnet-script /* ====================================================================== + AES-GCM (Galois/Counter Mode) -

AES Encryption Decryption Tool in .NET 8 (Console App)

AES Encryption Decryption Tool in .NET 8 (Console App)

Here is the code! copy it and paste it inside a file (say AESFileEncryptDecrypt.csx) and then run it with dotnet-script AESFileEncryptDecrypt.csx. I am assuming that you already have dotnet-script tool installed globally in your computer as well as .NET 8 SDK. In case you don't, you

JWE Generation & Verification in .NET 6

JWE Generation & Verification in .NET 6

This code is the result of a chat session with AI using codegemma:7b model. Generate JWE public static string GenerateJweToken(string issuer, string audience, SymmetricSecurityKey key, SigningCredentials credentials) { var claims = new[] { new Claim(JwtRegisteredClaimNames.Sub, "user_id"), new Claim(JwtRegisteredClaimNames.Name, "John Doe"), new Claim(

JWT Generation & Verification with HMAC SHA-256 Signature in .NET 6

JWT Generation & Verification with HMAC SHA-256 Signature in .NET 6

This code is the result of a chat session with AI using deepseek-coder-v2-latest model. using System; using System.IdentityModel.Tokens.Jwt; using System.Security.Claims; using System.Text; using Microsoft.IdentityModel.Tokens; class Program { static void Main(string[] args) { // Define the security key and algorithm to sign the token var

AES-256 Encryption / Decryption with Key in environment variable

AES-256 Encryption / Decryption with Key in environment variable

This is a very simple AES-256 string encryption/decryption program written in Node.JS using the built-in crypto library. // aes256.js const crypto = require('crypto'); const ENCODING = 'base64'; const KEY = process.env.MY_SECRET_KEY; function verifyKey() { if (!KEY) { throw new Error('MY_SECRET_KEY

.NET Environment Setup in MacOS

.NET Environment Setup in MacOS

Recently I've been assigned a task in which I will need to develop software using Microsoft .NET Framework. The only problem is that currently I am using a MacBook Pro so here is what I did to get from 0 to hero. brew install --cask dotnet-sdk Your console

How to create menu in Node.JS

How to create menu in Node.JS

From the times of my Borland C programming where we had a fixed-width terminal that never changed size I had come up with the following code in Node.JS to now make it dynamically adjustable. The following code is just a skeleton and may be adjusted to your needs. const