tldr/pages/osx/file.md

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# file
> Determine file type.
> More information: <https://github.com/file/file>.
- 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}}`
- Determine the mime encoding type of a file:
`file -I {{filename}}`