how to make a directory a git repo code example

Example 1: how to initialize a git repository command line

# New local repository
git init
git add .
git commit -m "Initial commit"

# New remote repository
git remote add origin [email protected]:username/new_repo #ssh
# Now push
git push -u origin master

Example 2: how to make a folder into git repo

$ git remote add origin [email protected]:username/new_repo
$ git push -u origin master

Example 3: turn a folder into a git repo

$ git filter-branch --prune-empty --subdirectory-filter FOLDER-NAME  BRANCH-NAME 
  # Filter the specified branch in your directory and remove empty commits
  > Rewrite 48dc599c80e20527ed902928085e7861e6b3cbe6 (89/89)
  > Ref 'refs/heads/BRANCH-NAME' was rewritten