Changsu Jiang chsjiang

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

LLM Wiki

A pattern for building personal knowledge bases using LLMs.

This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you.

The core idea

Most people's experience with LLMs and documents looks like RAG: you upload a collection of files, the LLM retrieves relevant chunks at query time, and generates an answer. This works, but the LLM is rediscovering knowledge from scratch on every question. There's no accumulation. Ask a subtle question that requires synthesizing five documents, and the LLM has to find and piece together the relevant fragments every time. Nothing is built up. NotebookLM, ChatGPT file uploads, and most RAG systems work this way.

	# Cluster management tools.

	export CLUSTER_NAME ?= $(shell cat tmp/current 2>/dev/null \|\| echo $$(whoami)-dev)
	export MACHINE_TYPE ?= n1-standard-2
	export DISK_SIZE ?= 100
	export MAX_NODES ?= 10
	export NETWORK ?= dev
	export PROJECT ?= foobar
	export VERSION ?= latest
	export ZONE ?= us-west1-a

	#!groovy
	/**
	* This is an example Jenkins pipeline Jenkinsfile for building and testing a private Github Go project that uses glide.sh.
	* This style of Pipeline works with the Jenkins Git plugin and multibranch pipeline projects. In a multi-branch project configuring
	* a webhook for push and pull request is needed from the Github repository to get builds to automatically start after a push.
	*/
	pipeline {
	agent {
	label 'your-agent-goes-here'
	}

	"*****************************************************************************
	"" Vim-PLug core
	"*****************************************************************************
	if has('vim_starting')
	set nocompatible " Be iMproved
	endif

	let vimplug_exists=expand('~/.config/nvim/autoload/plug.vim')

	let g:vim_bootstrap_langs = "javascript,php,python,ruby"

	FROM golang:1.21.0-bullseye as builder

	COPY . /workdir
	WORKDIR /workdir

	ENV CGO_CPPFLAGS="-D_FORTIFY_SOURCE=2 -fstack-protector-all"
	ENV GOFLAGS="-buildmode=pie"

	RUN go build -ldflags "-s -w" -trimpath ./cmd/app