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🖥️ Bash Terminal Cheatsheet

Fellow-level reference · Quick lookup, no fluff.

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📁 File & Directory Navigation

Command	What it does
pwd	Print current working directory

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Always Free AWS Services

After your 12-month Free Tier period expires, you can continue using AWS services that have "Always Free" offers. These services remain free up to specified limits as long as you have a valid AWS account. Some examples of Always Free services include:

• AWS Lambda - 1 million free requests per month
• Amazon DynamoDB - 25 GB of storage
• Amazon SNS - 1 million publishes per month
• Amazon CloudWatch - 10 custom metrics and alarms
• AWS CodeCommit - 5 active users per month
• AWS CodePipeline - 1 active pipeline per month

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framework_name	version	trigger_keyword	description	usage	author_persona
REFRAME	1.1	REFRAME	A structured, Fellow-Level methodology to reverse engineer a Business Requirements Document (BRD) and Product Requirements Document (PRD) from a live website URL or provided screenshots.	Apply the REFRAME framework to[URL/Screenshots]	Fellow-Level Product Manager and Business Analyst

🚀 START HERE: System Instructions

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Reverse engineering a Business Requirements Document (BRD) and a Product Requirements Document (PRD) from a live website is a classic exercise for Product Managers and Business Analysts. Because you are working backward from the final output, you have to separate the "Why" (BRD) from the "What and How" (PRD).

Here is the best, most structured methodology to reverse engineer these documents from a URL.

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Phase 1: Reverse Engineer the BRD (The "Why")

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PR Best Practices

Best Practice: Single PR for Related Changes

For all categories of changes that are closely related, they should be in one PR because:

1. Atomic Change Principle

• The main code change, tests, and documentation all serve the same purpose: e.g. Ref: Issue #619 making ItemSample publicly available
• They form a complete, logical unit of work
• Splitting them would create incomplete states in the codebase

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How to Clean Up Fork Commits and Sync with Upstream

TIL: When you accidentally add commits to your fork that shouldn't be there (like personal notes), here's how to clean them up and get back in sync with the upstream repository.

The Problem

Your fork shows: "This branch is X commits ahead of upstream:main" but those commits contain changes you don't want to contribute back (like personal notes, experiments, etc.).

Solution: 3 Options to Clean Up

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📚 R & RStudio: Working Directory Cheatsheet

This cheatsheet covers how to control and troubleshoot the working directory in R, RStudio Desktop, and RStudio Cloud. A correct working directory makes data import, script sourcing, and project management much smoother.

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1️⃣ RStudio Desktop: Setting the Working Directory

A. Launch from Terminal with Correct Directory

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Windows check whether your system supports UEFI by following these steps:

1. Press Win + R, type msinfo32, and hit Enter.
2. In the System Information window, look for BIOS Mode.
3. If it says UEFI, your laptop supports it! If it says Legacy, it does not.

Rufus

For UEFI supported system, we can opt to GPT for partition scheme. Otherwise, choose MBR.

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I have exported my bookmarks from Pocket into a CSV file and I will attach it now. Please help me convert it into a format that Raindrop.io can import:

• For each link, determine a Collection (high-level category) and assign appropriate Tags (subtopics). Collections are broad groups (e.g., Technology, Cooking, Health), while tags are specific keywords (e.g., Python, recipe, wellness).
• Include any original description or notes from Pocket in the note field if they add useful context.
• If a link has no clear topic or tags, put it in a generic Collection like Uncategorized or create a new one as needed.
• You can create new Collections or tags whenever necessary to organize the links logically.
• The final output should be a CSV file with columns: url, folder, title, note, tags (and optionally created). Use folder for the Collection name. Put multiple tags in quotes (for example, "tag1, tag2").
• Provide example groupings such as:
  • Technology (Collection) with tags "programming, Python, AI"
• R

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Tip: Passwords and keyboard layout It is recommended to only use US ASCII characters. In case of a system error or when you need to start your system in rescue mode, the keyboard may not be localized.

Here are the US ASCII characters:

! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~