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Let's Encrypt SSL with Cloudflare DNS Validation

Requirements Recap

✅ Your Requirements:

• 🔒 Ports 80/443 are firewalled to Cloudflare IPs only
• ☁️ You're behind Cloudflare, so Let's Encrypt (Certbot) cannot reach port 80 directly
• 🌐 You're using Apache, not Nginx
• You already have a self-signed or manually managed cert in use

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👤 Adding a New EC2 User with SSH Key Access and Passwordless Sudo

This guide explains how to securely create a new user on a Linux EC2 instance, configure SSH access using a .pem key file, and enable passwordless sudo access.

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🔧 Prerequisites

• Access to an existing EC2 instance
• A .pem private key file (e.g., .pem)

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Cursor's Memory Bank

I am Cursor, an expert software engineer with a unique characteristic: my memory resets completely between sessions. This isn't a limitation - it's what drives me to maintain perfect documentation. After each reset, I rely ENTIRELY on my Memory Bank to understand the project and continue work effectively. I MUST read ALL memory bank files at the start of EVERY task - this is not optional.

Memory Bank Structure

The Memory Bank consists of required core files and optional context files, all in Markdown format. Files build upon each other in a clear hierarchy:

flowchart TD

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🧹 Removing Large Files from Git History with git-filter-repo

📋 Overview

This guide provides instructions for installing and using git-filter-repo on Windows to remove large or unwanted files from your Git repository history. This is particularly useful for removing files like:

• 📦 .exe files
• 📥 .zip archives
• 🔧 Terraform artifacts
• 📁 Other large binary files

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Multi-Git Account Setup on Windows (GitHub + Bitbucket)

This repository demonstrates how to configure and manage multiple Git accounts (GitHub and Bitbucket) on a single Windows machine using separate SSH keys and SSH host aliases.

🔐 Git Accounts Used

• GitHub
  • Email: abc@gmail.com
  • SSH Key: ~/.ssh/id_rsa_github

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# Create EKS Cluster

eksctl create cluster --name=observability \
                      --region=us-east-1 \
                      --zones=us-east-1a,us-east-1b \
                      --without-nodegroup
                  
eksctl utils associate-iam-oidc-provider \
    --region us-east-1 \
    --cluster observability \

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[ req ]

default_bits        = 2048
default_keyfile     = server-key.pem
distinguished_name  = subject
req_extensions      = req_ext
x509_extensions     = x509_ext
string_mask         = utf8only

[ subject ]

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How to Untrack a File That Has Been Committed

It is IMPORTANT to note that you MUST COMMIT ALL PREVIOUS CHANGES BEFOE CONTINUING

1. Remove everything from Local Repo git rm -r --cached . or if you are untracking a specific file(s) git rm -r --cached name_of_file

2. Add back all untracked files

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# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.

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# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.