2024.08.14: the intense 8 hour hunt links
2024.07.19: dillinger.io markdown editor links
2024.05.14: crontab.guru crontab schedule expression editor links
2024.01.20: c-faq.com C frequently asked questions links
2023.04.06: tldp.org advanced bash scripting guide links
2023.04.06: pythontutor.com interactive python/java/c editor and visualiser links