What is a Terminal Command?
A terminal command is a text command that you can type in a terminal to execute a program. Terminal commands are typically names of programs that are meant to be executed together with the parameters that control their behavior.
This term is synonymous with "command-line command."
nvidia-smi (Nvidia's System Manager Interface command line utility) in a terminal.Examples of Terminal Commands
cd is a terminal command to "change (the current) directory," and its first parameter is the filepath of the new directory. The terminal command cd Downloads would change the current directory to the "Downloads" folder.
cp is a terminal command to "copy" a file. Its two parameters are the filepath of which file to copy and the filepath of where to place the copy. The terminal command cp diary.txt diary-backup.txt would create a backup copy of diary.txt in the current directory.
On Linux and BSD, ls is the terminal command to list the files of the current directory. On Windows, dir is the command for the exact same purpose.