SHELL

git config fodler level

$ git config --global user.name "John Doe"

git config fodler level

$ git config --system user.name "John Doe" 

git config fodler level

[includeIf "gitdir:~/company_a/"]
  path = .gitconfig-company_a
[includeIf "gitdir:~/company_b/"]
  path = .gitconfig-company_b

git config fodler level

[user]
name = John Smith
email = john.smith@companya.net

git config fodler level

[user]
name = John Smith
email = js@companyb.com