Under Unix, it is much harder to know what program the user wants to be launched and you will likely want to make this an option in a config file or in the environment. The idea still remains the same though.

For values of "Unix" near "OS X" you can use the open command which functions similarly to start (opening the file in the associated application).

In reply to Re^2: Perl Tk: opening a file in its original format by Fletch
in thread Perl Tk: opening a file in its original format by FM

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