der: filesystem tests, magic tests,
     and language tests.  The first test that succeeds causes the file type to
     be printed.

     The type printed will usually contain one of the words text (the file
     contains only printing characters and a few common control characters and
     is probably safe to read on an ASCII terminal), executable (the file con‐
     tains the result of compiling a program in a form understandable to some
     UNIX kernel or another), or data meaning anything else (data 