Determine file type.
- Give a description of the type of the specified file. Works fine for files with no file extension:
file {{filename}}
- Look inside a zipped file and determine the file type(s) inside:
file -z {{foo.zip}}
- Allow file to work with special or device files:
file -s {{filename}}
- Don't stop at first file type match; keep going until the end of the file:
file -k {{filename}}