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Changing information supplied when running file

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# 1  
Old 05-07-2015
Changing information supplied when running file
In unix systems I can call `file` to return me the file type.

Code:
file cel.vik
$ cel.vik: ASCII text

How can I append additional information when I create a file such that when I call `file` it returns me that additional information.
# 2  
Old 05-07-2015
man file:
Quote:
-i, --mime
Causes the file command to output mime type strings rather than the more traditional human readable ones. Thus it may say ‘text/plain; charset=us-ascii’ rather
than “ASCII text”.
Or you can create your own "magic" file (c.f. man file).
# 3  
Old 05-07-2015
I really need an example. Let's say I want to include "vik-codex" when I do `file cel.vik`. Do I need to do something when I create the file or can I append the information any time I want?
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