What is the name of music played on a violin while someone getting beaten up in one Clint Eastwood cowboy films I think film was Josey Wales?

You're thinking of the classic theme from "The Good, the Bad and the Ugly" by Ennio Morricone. It's often used in scenes of violence or tension, and the distinctive "du-du-du-du-du-du" melody is iconic and instantly recognizable.

While the film "Josey Wales" also features a memorable score by Jerry Fielding, the specific piece you're describing is from "The Good, the Bad and the Ugly" and has been used in countless other films and media.