Thinknote

• How to Install CentOS 8: Download and Basic Server Setup Guide

• Linux user management useradd usermod userdel

• Linux administrator tool – enable cockpit

• Activate Centos 8 RHEL & REMI Repository

• Install Nginx web server (Centos 8)

• firewall settings

• VirtualBox Virtual Box virtual machine download and installation

• Download Ubuntu and set up Ubuntu (virtualbox)

• Install Ubuntu 22.04.1 (VirtualBox)

• ubuntu update and upgrade

• Install and enable Ubuntu firewall iptables

• Ubuntu iptables Firewall Management: Practical Setup and Commands

• Ubuntu OpenSSH and MobaXterm Setup: Remote Server Access Guide

• Setting up and connecting Ubuntu SSH ports

• Install Nginx web server (ubuntu)

• Install PHP 8 (ubuntu)

• Setting up Nginx + Php8

• How to use the R pipe operator %>%: An easy way to read data analysis flows

• Text replacement str_replace, str_replace_all functions

• str_squish function to remove unnecessary spaces

• Understanding Tibble and the as_tibble() function

• How to use unnest_tokens function: How to split by words in R text mining

• How to connect PHP to R: How to call an R script on the web and receive the result

• Installing and managing MariaDB (MySQL)

• Install OpenSSL

• Free HTTPS setup (Let’s Encrypt, Cloudflare)

• Install memory caching APCu, Redis, Memcached

• Nextcloud installation and settings

• What is research: Summary of research concepts for introduction to R statistics

• Variables and Measurement R Statistics: Understanding independent variables, dependent variables and measurement levels

• Measurement Error R Statistics: Easily Understand Random Error and Systematic Error

• Validity/Reliability R Statistics: Criteria for judging a good measurement tool

• Research Method Introduction to R Statistics: Understanding research design and analysis methods at a glance

• Korea Ecommerce Outlook 2024–2025: PEST Analysis of Market Change

• 2026 Cancer Insurance Comparison Platform Market Forecast: Competitive Landscape and Consumer Selection Criteria

• In the 2026 retirement pension era of 400 trillion won, who will be the winner in the competition for returns?

• Jeju Tourism Outlook 2026: PEST Analysis of Risks and Survival Strategy

• How to apply for high oil price subsidies: Eligibility, period, and usage at a glance

• Summary of festivals in Korea in May 2026: Schedule by region and theme

• How to Read the Universal Calendar: An Introduction to the Meaning and Principles of Saju for Beginners

• Frame analysis of Samsung Electronics union article: Between “Let’s talk” and “We refused”

• June 2026 Festival Schedule in Korea: Comprehensive summary by region and theme

• Analysis of Cannes reaction to Na Hong-jin’s “Hope”: Reasons for the difference between favorable and harsh reviews

• Top 10 domestic travel destination recommendations for June, from hydrangeas to festivals, all in one place

• Top 10 Hydrangea Spots in Korea, from flowering time to parking check

• Why the nationwide simultaneous local elections on June 3 and the 2026 local elections are important for the future of Korea

• Mac File Organizer: How to easily extract only files in subfolders

• Recruitment analysis on May 29, 2026: Recruitment market structure and occupation/wage distribution

• 2026 driver’s license subsidy, what will be different by region? Key criteria to check before applying

• Analysis of article titles by media company for 2026 local elections: How to read keywords and frames neutrally