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Almost every desktop environment has a mechanism for determining what to do when you (double)-click a file in file manager/explorer windows. This can be based on the extension, or on whatever file does, etc.

Now, suppose I have a terminal window open within a desktop session and I'm at some folder. Is there some binary or script - hopefully valid across multiple desktop environments common to Linux - which, when executed with a filename as its argument, uses this mechanism and has the same effect as (double)-clicking that file would?

If there isn't a single multi-desktop-environment way to do this - are there a bunch of desktop-environment-specific binaries/scripts with this functionality? If so, can you list such a bunch?

On Windows I think this exists in the form of the start command (although, of course, they can assume a single desktop environment.)

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    For Ubuntu see here. Maybe this works for other linux too. – ridgy Jun 9 '17 at 11:47
  • +1 xdg-open is part of the freedesktop xdg-utils suite - so should be a bit more generic than just Ubuntu I think – steeldriver Jun 9 '17 at 11:49
  • You're right, thank you. See unix.stackexchange.com/questions/251054/… – ridgy Jun 9 '17 at 11:51
  • @steeldriver: Make that an answer so I can accept? – einpoklum Jun 9 '17 at 13:00
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For desktop environments that implement the freedesktop.org xdg-utils tools, you should be able to use xdg-open:

Name

xdg-open — opens a file or URL in the user's preferred application Synopsis

xdg-open { file | URL }

xdg-open { --help | --manual | --version } Description

xdg-open opens a file or URL in the user's preferred application. If a URL is provided the URL will be opened in the user's preferred web browser. If a file is provided the file will be opened in the preferred application for files of that type. xdg-open supports file, ftp, http and https URLs.

xdg-open is for use inside a desktop session only. It is not recommended to use xdg-open as root.

Options

--help Show command synopsis.

--manual Show this manual page.

--version Show the xdg-utils version information.

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