File
File type identification. The file command is "a file type guesser", that is, a command-line tool that tells you in words what kind of data a file contains. Unlike most GUI systems, command-line UNIX systems - with this program leading the charge - don't rely on filename extentions to tell you the type of a file, but look at the file's actual contents. This is, of course, more reliable, but requires a bit of I/O.http://www.darwinsys.com/file/
ftp://ftp.astron.com/pub/file/
http://www.t2-project.org/packages/file.html
Download
file for Wary5file file type identification | software: @ smokey01.com; @ pkgs.org | +bzip2,+grep,+libmagic,+tar | source code | t2-project.org