What do you call a command that is issued without any additional options or arguments?

The term for a command that is issued without any additional options or arguments is known as a standalone command. A standalone command is executed in its simplest form, which typically consists of just the command name itself. This signifies that the command will run with its default behavior, relying on any preset configurations or defaults established within the command's environment.

For instance, if you were to issue a command like ls in a shell, it would execute and display the contents of the current directory without needing any flags or parameters. The simplicity of standalone commands makes them easy to use, especially for beginners or for executing common tasks.

In contrast, other terms, such as shell command, basic command, and default command, may imply specific characteristics or functions that do not strictly define the nature of a command without additional options or arguments. A shell command, for example, encompasses a broader range of command executions that may include arguments and options. Basic commands and default commands also imply a level of simplicity or pre-defined behavior but do not specifically capture the essence of being issued without any additional specifications.