A file extension is an optional alphanumeric identifier which comes after the last found period in a file name. A file extension itself does not define what type of data is in a file, but it does give a hint as to what is *supposed* to be in the file.

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Always use the selected program, always greyed out [duplicate]

This one is driving me nuts, I'm trying to change the default program for sln files but for some reason the "always use the selected version" is always greyed out. How do I get that little grey box ...
2
votes
5answers
2k views

What does the 'X' in .aspx, docx, xlsx, etc… represent? [duplicate]

Possible Duplicate: What does X denotes in ASPX, DOCX, XLSX, PPTX etc? It's one of those things you just take for granted until one day someone asks you and you realize you can't answer it. ...
7
votes
3answers
5k views

What file format/database format does Picasa use?

I am trying to figure out what file format the .db file and .pmp files are. I tried using db_dump (Berkeley DB) for the .db files, but it seems that they are not Berkeley DB, or of an older version. I ...
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1answer
927 views

Does Microsoft Word for Mac save files with extensions?

When you save a document in Microsoft Word for Mac, does the resulting file have an extension (e.g. ".doc" or ".docx")?
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votes
3answers
2k views

How to change the extension of all selected files at once?

Its possible to rename files all at once. But its not possible to change the extension of selected files all at once. If windows doesn't support this facility .. then is there any batch script or ...
4
votes
2answers
4k views

How to create a default association for files with no extension [duplicate]

Possible Duplicate: How to set the default program for opening files without an extension in Windows? I am using http://www.pnotepad.org/ (i wouldnt mind switching to something else if it ...
3
votes
1answer
246 views

Windows 2003 lost file extensions

I have a server with windows 2003, recently i installed a software in this server. When i restarted server my all files can't open sending to a command prompt saying: No program associated with ".exe" ...
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votes
4answers
9k views

Find files filtered by multiple extensions

What is the correct syntax for: find . -type f -name \*.\(shtml\|css\) This works, but is inelegant: find . -type f -name \*.shtml > f.txt && find . -type f -name \*.css >> f.txt ...
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votes
2answers
3k views

What virus renames all images to EXE? [duplicate]

Possible Duplicate: How do I get rid of malicious spyware, malware, viruses or rootkits from my PC? I have a virus that renames all jpg file extensions to EXE files and hide the original ...
6
votes
4answers
1k views

What does X denotes in ASPX, DOCX, XLSX, PPTX etc?

Previously there were ASP, DOC, XLS, PPT etc and now ASPX, DOCX, XLSX, PPTX respectively. What does X denotes in ASPX, DOCX, XLSX, PPTX etc?
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votes
1answer
383 views

Mac OS X 10.5 show suffix default

Does anybody know how you can make files show their suffix on default in finder. Currently I have to open the info window for each file and deselect "Hide extension". Greetings elhombre
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1answer
1k views

How can I make locate/updatedb ignore certain file extensions?

For instance, I don't want either program to find files that end in *.pyc. I'm sure I can do this somehow using regexes or globs, but is there a way to make locate just ignore the files altogether? ...
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votes
8answers
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How do you remove a default program association for file types in Windows 7?

I somehow have set the default file type association for a file type in Windows 7. It doesn't appear to be possible to delete it from the "Change the file type associated with a file extension" ...
1
vote
1answer
130 views

What should the .help file extension be registered to on OS X?

I recently got a package of .help manual files for a device. Unfortunately, some gremlin has decided these files should open with "Disk Inventory X", which gets thrown into an absolute transport by ...
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2answers
630 views

Any tool available to make renaming in Windows XP more like Mac OS X?

I've noticed 1 cool thing and OS X. When you rename a file, it automatically selects everything up until the extension. For example, attempting to rename this.is.a.file.png would preselect ...