Dune

Dune is a shell for command-line use and scripting that combines traditional shell operations with functional programming features. It supports piping, file redirection, and program execution while providing access to a standard library and functional programming abstractions. Developers can use Dune for various programming and system administration tasks alongside normal shell work.

Dune is developed by adam-mcdaniel and is written in Rust. The project is licensed under the MIT license. The shell uses a configuration file called .dune-prelude in the home directory to set up the environment each time a new session starts, allowing users to define environment variables, functions, and other commands. The interpreter is designed as a standalone component, meaning users can create custom frontends and build their own versions of the shell.