Is there a tool that can determine the file type from containing data?
Short: I need a program that can identify the filetype of a file regardless of it's extension
Long: Back in the day (15y ago) I had a MS-DOS program that would identify the filetype of "any" file you gave it, with it I was able to find some hidden content on games and progs. Now I have a program that I'm sure uses some kind of itermediate filetype, but I can't for the love of god find out wich one is it. The program can be for windows or linux (deb).