Basics:

• Version Control System: atlassian_blog, medium_blog
• GitHub docs
• Git Docs, Cheat-sheet, github_docs
• Setup and Intro, docs
• Learn git & GitHub: blog, video, video2, blog2

Advanced:

• Signed/verified commits (ssh and gpg keys): docs
  • ssh keys setup, video,
  • GPG keys setup
• Connections between repos, link
• Internal working of git, link, blog
• Resolving merge conflicts, link, link2,
• Intro to CI (Continuous Integration) and CD (Continuous Development), link
• GitHub CI/CD, docs, link, link2