Package file

A utility for determining file types

http://www.darwinsys.com/file/

The file command is used to identify a particular file according to the
type of data contained by the file. File can identify many different
file types, including ELF binaries, system libraries, RPM packages, and
different graphics formats.

General Commands (Section 1)
file
This manual page documents version 5.29 of the file command. file tests each argument in an attempt to classify it. There are three sets of tests, performed in...