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I use various 3rd party libraries to convert files on my Linux server. For instance, ImageMagick/convert for images, libreoffice3.5/convert-to for Microsoft Office documents, etc.
Is it possible that these applications require the pre-converted file to have the proper extension for the type of file? For instance, if the file was a png file, it would need to be called whatever.png and not just whatever.
Thank you
your question sounds general, and in general linux apps do not require extensions. bash will execute a .png file with shell commands happily and vi will open a text file called a.exe. extensions are in general not a unix/linux concept to begin with and . is just an allowed character in the file name.
this being said, some particular application may interpret or even require correct extensions.