Hi all. Suppose I have a file made by a list of names and surnames, e.g.: Arvo Part Harold Pinter Lucio Battisti Antonio Amurri Eduardo De Filippo Eduardo De Filippo and that I want them listed all on one line, separated by a comma and without duplicates, i.e.: Arvo Part, Harold Pinter, Lucio Battisti, Antonio Amurri, Eduardo De Filippo How can I do that with proper Unix commands? Thanks for any help. Rodolfo