Yes, it's just a widely used convention, and a POSIX guideline. 12.2 Utility Syntax Guideline #10 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1

Yes, it's just a widely used convention, and a POSIX guideline. 12.2 Utility Syntax Guideline #10 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap12.html https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1...