• Create a git repository: git init
• Add files to the repository: git add [filename or "--all"]
• Committing the added files: git commit
• Creating a branch (current branch won't change - you'll have to perform a checkout after having created the new branch): git branch [name of new branch] [source branch]
• Check in which branch I am: git branch
• Check out a branch (!!TO AVOID COMPLICATIONS CHECK FIRST WITH git status THAT YOU HAVE NOTHING UN-ADDED OR UNCOMMITTED IN THE CURRENT BRANCH!!): git checkout [target branch]
• Delete a file from GIT's history: git filter-repo --invert-paths --path <path to the file or directory>
• Merge a source branch into a target one:
  • Check (with "git status") that you have nothing un-added or uncommitted in both source and target branches.
  • Check out the target branch.
  • git merge [source branch]