command, but don't perform function lookup (i.e., refuse to run any command that is neither in
PATH nor a built-in). Set exit status to that returned by
command cannot be found, in which case exit with a status of 127.
Search default path, ignoring the
PATH variable's value.
Print the command or filename that invokes the command.
Like -v, but also print a description of the command.
Treat everything that follows as an argument, not an option.