1
vote
1answer
1k views

How to automatically recover lost file extensions?

We're recoverying bunches of data from a crashed partition of which we had no backup, using a data recovery software. Files are getting recovered, but file names are lost. Is there any software or ...
1
vote
2answers
510 views

How do I dissociate a program from a file type?

If I have a file.class and I opened it with Notepad, how do I destroy that association so that Notepad is not associated with .class? I do not want to change the .class association to another program ...
9
votes
2answers
2k views

Show/hide extension of a file through OS X command line

I'm looking for a way, via terminal, to change whether or not a specific file's extension is shown in the Finder, something along the lines of: $ hideextension ~/music/somesong.mp3 Without having ...
4
votes
2answers
553 views

How does a file have NO EXTENSION?

Take for instance: cat /etc/passwd Why doesn't this file have an extension such as .txt, .dat, etc? Or does an extension exist, but it's just being hidden? Does this apply strictly to Unix-like ...
64
votes
4answers
15k views

Is there a tool that can determine the file type from containing data?

I sometimes get files from my clients that have the wrong file extension. For example, the name is image.jpg but the file is actually a TIFF image. In many cases I can clarify it by opening the file ...
1
vote
2answers
644 views

How to change extensions?

In Windows 7, I want to change an .ai (Adobe Illustrator) file extension to a .pdf extension...How do I do this? I have tried renaming the file, but Win7 still thinks it is a .ai file...how do I ...