DevOps Classroomnotes 25/Feb/2023

Git Authentication Methods

• Git has two popular authentication methods
  • username and password/token
  • ssh key pair
• Creating a PAT for GitHub Refer Here
• Use ssh-keygen to generate id_rsa and id_rsa.pub files in <HOME-DIR>/.ssh
• copy the id_rsa.pub in GitHub => Settings => SSH and GPG keys => New SSH Key

Git Remote and Branches

• The command to push git push <remote-name> <branch-name>

Upstream branches

• In Git while pushing the code if we observe the following errors
  
  
• By setting the upstream branch we are setting the default remote

Making changes in Local commits

• We have the latest commit in which there is typo in commit message which we want to correct
  
  
• Now i want to delete this extra commit and then fix typo
• Clone the code from Refer Here
• git commit --amend can be used to reword the latest commit not previous
• Look at classroom video to
• edit: make the changes in commit
• reword: change the commit message
• squash: combine commits
• Exercise: Refer Here. Try to solve atleast 10 exercises.

Git Repository Types

• Bare Repository: This repository will have only .git folder no working tree. This is used generally on server sides on git remotes
• mirror Repostiory: This repository also will have only .git folder and used to cater to other users
• Normal Repositoru: Here we get working tree as well as .git and is used for development.

Other topics

• Force push git push --force this command pushes the changes to git remote and overrides the remote repo history.
• Git maintains two logs in your local repo
  • log
  • ref log: maintains the history of all changes done into local
    
• Try git log examples and git diff examples