[ILUG-Cochin.org] File extensions

[gingerjoos]

http://en.wikipedia.org/wiki/File_format#Magic_number
When you run the file command, the magic number is one of the items tested
to find the type of the file (see man file).

Anirudh S

On Tue, Jan 27, 2009 at 11:50 AM, Syam Kumar R. <syamkumar at gmail.com> wrote:

> I don't think Linux judges file type from extensions. Applications and
> Desktop environment recognises files in different ways. For example, Apache
> recognises mime-type from file extension. But in Gnome, it is by file
> content. You can rename a .txt file to .png or .jpg. It is still considered
> a text file. Similarly, you can rename a png or jpg as a .txt file, it still
> opens in your default image viewer. Just right click and open property
> window, you can see that mime-type is listed correctly. The icon graphic
> doesn't change either. If you create a .txt file or extensionless file with
> some html or php code, it will open in your browser. Just adding
> #!/usr/bin/sh in the beginning of a text file will make its icon change to a
> shell script icon.
>
> --
> Syam Kumar R.
> http://www.webmasterview.com/
>
>
>
> On Mon, Jan 26, 2009 at 9:27 PM, Sreejith K <sreejithemk at gmail.com> wrote:
>
>> Correct..........
>>
>> Sreejith K
>> Web: http://sreejithemk.net
>>
>>
>> On Mon, Jan 26, 2009 at 8:30 AM, AZAD NIKARTHIL <
>> azadnikarthil at yahoo.co.in> wrote:
>>
>>>  Those people who like to add comment on this topic can qoute ur
>>> comment...
>>>
>>> File extension is just a string similar to the name of the file...
>>> only difference is that with the exetension operating system could able
>>> to judge the which type is the file.... so that it could able to show u
>>> standard picture of that extension.. And when u double click that icon it
>>> could able to inwalk correct application program to run that file..
>>>
>>> Am i correct...
>>>
>>> Is there any Other intentions behind the file extensions..
>>>
>>> Plz Quote ur comments on this topic
>>>
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