The file command is “a file type guesser,” a command-line tool that tells you what kind of data a file contains. It doesn’t rely on filename extensions to tell you the type of a file, but looks at the file’s actual contents.
If you have not already done so, install the its-release package that grants access to ITS’s yum repository.
Then install as follows:
% sudo yum install file-unc
Files are installed in /opt/unc.
1. The latest version available is file 5.31. Vendor release date: May 23, 2017.
This package can be managed using the lpm command.
% lpm load file
will set the PATH, LD_LIBRARY_PATH, and MANPATH environment variables so that the file binary, libraries, and manpage can be accessed.