DevOps Classroom notes 25/Feb/2026

Version Control Systems

• CI Starts with changes into Version Control System.
• Terms:
  • Repository: Is a storage and it also has versions or revisions i.e. history of all of the changes done
  • Changeset: This is set of changes across single/multiple files done to add a feature.
• Statement:
  • Organizations need Source Code Repositories not Source Code Storages.
  • These Source Code Repositories should have information about
    • revisions/versions
    • who has changed
    • why
• Version Control System:
  • Is a Source Code Repository
  • User Management
  • Allows to work on paralled versions or releases.
  • Multi USer Access simultaneously
    
• Popular Version Control Systems
  • Git
  • Subversion
  • Perforce
  • Mercurial
  • Clear Case
• Evolution
  • Single Host Multi User Version Control Systems
  • Multipe Users Multiple Hosts
    
  • Distributed Version Control
    
• Git is a popular Distributed Version Control System.
• Git repositories can be
  • self hosted:
    • Gitolite
    • Gerrit
  • Git as a Service
    • Github
    • Gitlab
    • BitBucket
  • Cloud Providers
    • Azure Source Repos
    • AWS Code Commit