Install File by running the following commands:
root:file-3.31# ./configure --prefix=/usr --datadir=/usr/share/misc
root:file-3.31# make install
The File package contains the file program.
File tests each specified file in an attempt to classify it. There are three sets of tests, performed in this order: filesystem tests, magic number tests, and language tests. The first test that succeeds causes the file type to be printed.