command line

This term refers to the specific environment where a user interacts with a computer via a text-based shell. It is often contrasted with a Graphical User Interface (GUI), which relies on visual elements like icons and windows. In professional technical discourse, it is frequently used as a shorthand for the command-line interface (CLI) itself.

While the term is typically used in the singular to describe the interface or the specific line of text being entered, it can be pluralized when referring to multiple distinct sequences of instructions or different interface environments across various systems.