Here's my list of bookmarks for various bookmarks. I'll keep adding to it over time.

General Documentation and How-to

Docker / Kubernetes / General Container Info

• Docker install guide for ubuntu
• Resource Management for Pods and Containers (Kubernetes Documentation)
• kubectl install guide
• minikube documentation guide for integrating with kubectl

News

Email newsletters

• tldr; sec - Newsletter covering a wide variety of topics in security.

Training platforms / educational training services

Cloud Service Providers

• Microsoft Training Documentation - (Free) - A great Microsoft resource for security principles and training.
  

Community / Collaboration / Forums

• Information Security - Stack Exchange - (Free) - Established security community with deep knowledge and insight. Excellent resource for Q&A.

General / Miscellaneous

• CBT Nuggets - (Paid) - Really solid video-based learning. Instructors are genuinely excited about the material which makes it more engaging and interesting.
• LinkedIn Learning - (Paid) - A wide variety of business-related training courses and material. Recently other training institutes (like ITProTV) have posted stuff here too.
• Replit - (Freemium) - Interactive site/app for developing programming/scripting skills. Sort of like a public web-based IDE.
• Sololearn - (Freemium) - Interactive site/app for developing programming/scripting skills.

Network Security Controls

• Fortinet Training Institute - (Free) - Fortinet-centric training material.

Offensive Security / Pen Testing

• Hack The Box - (Paid) - One of my favorite resources for practical training. Fantastic resources.
• Try Hack Me - (Paid) - An alternative to Hack The Box. Similar in purpose thoough