There are many different shell environments that are commonly used, including:  Bash (Bourne Again Shell): Bash is a Unix shell and command language that is widely used as the default shell on many Linux and macOS systems. It is also available on other platforms such as Windows. Bash is known for its powerful scripting capabilities and its support for a wide variety of commands and utilities.  Zsh (Z Shell): Zsh is another Unix shell that is similar to Bash, but it has some additional features such as better support for interactive use and better handling of command line editing.  Fish (Friendly Interactive Shell): Fish is a Unix shell that is designed to be more user-friendly and interactive than other shells, with features such as auto-suggestions and syntax highlighting.  Csh (C Shell): Csh is a Unix shell that was developed as an alternative to the Bourne shell (sh). It is known for its support for aliases and history substitution, as well as its C-like syntax.  Ksh (Korn Shell): Ksh is a Unix shell that was developed as an improvement on the Bourne shell. It is known for its support for functions and advanced shell scripting features.  Tcsh (Tenex C Shell): Tcsh is a Unix shell that is based on the C shell, with additional features such as command line editing and improved support for variables and arrays.  Dash (Debian Almquist Shell): Dash is a Unix shell that is used as the default shell on some Debian-based systems. It is a lightweight shell that is designed to be faster than other shells, but it has fewer features than some other shells.