README

We constantly learn new things. This is a repo to share those learnings.

Table of Contents

Algorithm

• Algorithm Basics

  • Algorithm101

  • Brute-Force

  • Greedy Algorithm

  • Divide and Conquer

  • Backtracking

  • Graph

  • Minimum Spanning Tree

  • Dijkstra Algorithm

• Sorting Methods

  • Insertion Sort

  • Selection Sort

  • Merge Sort

  • Quick Sort

• Data Structure & Algorithms in Python

  • List Based Collections

  • Searching and Sorting

Java

• Java Environment Setup

  • Multiple Java Versions in MacOS

• Java 101

  • Java Basics

  • OOP

  • Data Types

  • Variables

  • Loops & Conditional Statements

  • Array

  • Access Modifiers

  • Inheritance

  • JVM

  • GC

  • Java Memory Area

  • Collection

  • TreeSet, TreeMap vs HashSet, HashMap

  • Annotation

  • Generic

  • Static Keyword

  • Final Keyword

  • Overriding vs Overloading

  • Wrapper Class

  • Checked & Unchecked Exception

  • ==, equals(), hashCode

  • Interface vs Abstract Class, Abstract method

  • Initialization Order of Member Variables

  • Lambda Expression

  • Stream API

  • Optional Class

• Java Advanced

  • Lombok

  • Java Thread

  • JMX and Jolokia

  • Constructor vs Factory method

  • GC Algorithm

  • Guidelines for Selecting a GC

  • CompletableFuture

Spring

• Spring 101

  • IoC

  • DI

  • AOP

  • Spring Bean

  • Spring Container

  • Spring and SpringBoot

• Spring Advanced

  • Spring Security

  • Register a Spring Bean in the Spring IoC Container

  • Interceptor vs AOP vs Filter

• Spring Annotations

  • Lombok

  • @Controller and @RestController

  • @Transactional

  • @Autowired

  • @RequestParam

  • @ConditionalOnProperty

  • @ConditionalOnBean

  • @ConditionalOnClass

  • @Qualifier

  • @Valid vs @Validated

  • @EnableIntegration

  • @IntegrationComponentScan

  • @AfterReturning

  • @ConfigurationProperties

  • @AuthenticationPrincipal

• JPA Annotations

  • @Entity

  • @Column

  • @Immutable

OS

• OS 101

  • What is an OS

  • System Structure & Program Execution

  • Process

  • CPU Scheduling

• OS Basics

  • What is an Operating System

  • What is Hyper-Threading

  • Process vs Thread

  • Multithread and Multiprocess

  • Scheduler

  • Synchronous vs Asynchronous

  • Blocking vs Non-blocking

  • Process Synchronization

  • Deadlock

  • Locality of Reference

Linux

• Linux 101

  • Linux 명령어 정리

  • Linux Kernel

  • Linux Directory Structure

  • Use SCP Command to Securely Transfer Files

  • Linux Performance Analysis in 60 seconds

  • Ways to Check Linux OS Version in Command Line

  • tmux cheatsheet

  • Logrotate

• Arch Linux

  • What is Arch Linux

  • SLUG Meetup - Arch Linux

• Ubuntu

  • Using apt-get Commands in Ubuntu

  • Free Up Space on Ubuntu

  • Customize Your Ununtu Terminal

  • Create Desktop Shortcut on Ubuntu

  • Settings for XDG user dirs

  • Fix AirPods not Working on Ubuntu

  • Setting a JAVA HOME Path in Ubuntu

• RedHat

  • RPM Options for RedHat Fedora Centos Installs

Server

• Server 101

  • HTTPS and SSL

  • What is NGINX

  • Scale Up and Scale Out

  • What is Cache?

• ServerLess Computing

  • What is ServerLess Computing

  • AWS Serverless Meetup - AppSync

  • Getting Started with AWS Lambda

  • Serverless Framework Setup for AWS Lambda

• Deployment

  • Deploying a Django project on PythonAnywhere

  • Deploying a Django project on Microsoft Azure

  • Deploying a Django project on Heroku

  • Using AWS S3 to Store Static Assets on Heroku

  • Deploying a Vue project on Netlify

  • Deploying a Django-Vue application on AWS EC2 using NGINX

  • Deploying a SpringBoot-React project on AWS EC2

Network

• Network 101

  • 네트워크 용어 사전

  • Protocol

  • OSI 7 Layers

  • TCP/IP

  • Encapsulation and Decapsulation

  • Types of Computer Network

  • Network Lines

  • Network Components

  • Network Address Types

  • MAC Address

  • IP Address

  • TCP / UDP

  • ARP

  • Subnet and Gateway

  • Switch

  • VLAN

  • STP

  • Router

  • Session and Cookies

• Http

  • Http Stateless

  • Http Methods

  • Cookie, Session, and Token

  • HTTP/2

  • RESTful API

  • Keep-Alive Header

  • HTTP vs HTTPS

DB

• DB 101

  • DB Basics

  • SQL and Django ORM

  • One to Many Relationship

  • Many to Many Relationship

  • Dump and Load Data

  • MySQL with Django

  • Create MySQL Users Accounts and Grant Privileges

  • How to Avoid N+1 Queries

  • Configure PostgreSQL on your Mac

  • INNER JOIN & OUTER_JOIN

  • Primary key vs Unique key

  • Stored Procedure

• DB Advanced

  • SQL Order of Operations

Git

• Git Basics

• Git Tips and Tricks

• Git Branch

• Create a gitignore

• Caching your GitHub credentials in Git

Infra

• DevOps 101

  • IT Infrastructure Basics

  • What is DevOps

  • DevOps Engineer Roles and Responsibilities

• CI/CD

  • Configuring GitLab CI-CD with AWS EC2

• Jenkins

  • Jenkins Build and ECR Push

• ELK

  • Search System Basics

  • Filebeat Basics

  • Logstash Basics

  • How Logstash Works

  • Index and Shards

• Terraform

  • Terraform 101

• Ansible

  • Ansible 101

• Redis

  • Install and config Redis on macOS

  • Redis 101

  • Redis Commands

AWS

• AWS 101

  • What is Cloud Computing

  • Getting Started with AWS

  • AWS Main Services

  • AWS Main Products

  • AWS Servers

  • AWS Storages

  • AWS Database Server

  • AWS HA Load Balancing

  • AWS Analytics

  • AWS Blockchain

  • AWS IoT

  • AWS Machine Learning

• AWS Services

  • Amazon EC2-Creating an AWS EC2 Instance

  • Amazon S3 - Creating a Bucket

  • Amazon RDS for MySQL

  • AWS CLI

  • Amazon ECR (Elastic Container Registry)

  • Amazon ElastiCache

  • Amazon Route 53

  • Amazon Athena

  • Amazon VPC

• AWS Tips

  • AWS Online Cloud Clinic #01

  • AWS Online Cloud Clinic #03

  • AWS Data Science Meetup - Amazon Personalize (03/05/2020)

  • AWS Security Meetup (07/23/2020)

  • DevAx Connect-CDK로 EKS Cluster Fullstack 관리하기 (09/01/2020)

  • AWS CDK Workshop

  • AWS Builders - Cloud Economics

  • Amazon VPC Basics

  • Amazon Security Group

  • AWS Well-architected Framework - Security Pillar

  • Find EC2 Instance by Domain Name

  • Resizing an Amazon EBS Volume

  • What Are AWS Elasitc Network Interfaces

  • Estimate AWS Resource Costs

• AWS Certifications

  • Solutions Architect

  • SAA Prep Workshop

  • AWS 10,000 Foot Overview

• AWS Builders Series

  • AWS Cloud기반 나의 첫 web application 만들기

  • DevOps 문화 모범 사례와 구현 도구 살펴보기

• Practical AWS

  • VPC

  • Subnet

  • Route 53

  • Route Table

  • Elastic IP

  • Security Group

  • Network ACLS

  • VPC Peering

  • VPC Endpoints

  • AMI

  • Load Balancer

Docker

• Docker Commands

• Getting Started with Docker

• Docker Tags

• Docker Run

• ENTRYPOINT vs CMD

Kubernetes

• Kubernetes Basics

• EKS for Kubernetes

• What is Ingress

• Kubectl Commands

• How Kubernetes works

• Helm Package Manager

• Pod

• Cluster

• Namespace

• Node

Go

• Go 101

  • Go Basics

  • Variables and Constants

  • Functions

  • For Loop

  • If Else

  • Switch

  • Pointers

  • Arrays and Slices

  • Maps

  • Structs

  • Go Routine

  • init() function

Python

• Python 101

  • Python Coding Convention

  • Python Tips & Tricks

  • Python Virtual Environment

  • @property in Python

  • Generators in Python

  • Type Hints in Python

  • Unit Testing in Python

  • Working with Datetime Objects and Timezones in Python

  • itertools.cycle

• Python Advanced

  • Handling Encoding Issues Using Redis with Python

  • Python GIL

Django

• Django 101

  • Django Basics

  • Variable Routing & DTL

  • Templates

  • Model

  • URL name

  • Form & ModelForm

  • Authentication

  • Request and Response Objects

  • ImageField

  • Optimization

  • Django RESTful Framework

  • Class Based View

  • DRF with JWT

Flask

• Flask Routes

GraphQL

• GraphQL 101

  • Intro to GraphQL

• GraphQL Korea Meet-up

  • GraphQL Korea Meetup (06/13/2020)

Web

• HTML

  • HTML Basics

  • HTML Sections & Outlines

• CSS

  • CSS Basics

  • CSS Layout

  • CSS Advanced

  • Grid System

• JavaScript

  • JavaScript Basics

  • Array & Function

  • JavaScript DOM

  • JavaScript Events

  • JavaScript Functions

  • JavaScript Object

  • JavaScript Basic Syntax

  • Array Helper Methods in ES6

  • Hoisting in JavaScript

  • this keyword

  • AJAX

Vue.js

• Intro to Vue.js

• Vue Intermediate

• Vue CLI

• Vue Router

• Props and Emit

• Vue Loader

React.js

• React Hooks

• Caret vs Tilde in package.json

• Yarn vs npm

• Redux

Node.js

• Node.js 101

  • Installing Node.js using NVM

  • Intro to Node.js

  • Environment Setup

  • First Application with Node.js

  • REPL Terminal

  • NPM

  • Callbacks Concept

  • Event Loop and EventEmitter

  • Buffers

  • Web Module

• Express.js

  • Express Basics

  • EJS

  • RESTful API

Programming 101

• 프로그래밍 용어 사전

• 새로운 언어를 학습하는 방법

• 배포란 무엇인가

• Vim 명령어 정리

• Discrete Mathematics

• Computational Thinking

• Technical Interview Prep

• Getting Started with Open Source

• Microservices Architecture Style

• Sync vs Async and Blocking vs Non-Blocking

• Chrome Force Dark Mode 설정하기

Troubleshooting

• xcrun error occurred after macOS update

• Resetting the permission in /usr/local

• Brew error - compinit:503: no such file or directory

• Scouter_client_JVM_error_after_macOS_Bigsur_update.md