The Dotenv gem is a Ruby library designed to load environment variables from a .env file into the ENV hash, making it easier to manage application configuration.
Config files in Python store app settings and preferences, allowing developers to manage software operation across environments without changing the code.
Environment variables affect running processes on a computer. In Jenkins, they set configuration settings and command options for various jobs and scripts.
HashiCorp Vault securely manages sensitive information like tokens, passwords, certificates, and encryption keys, offering robust access control and storage.