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How to open a file in it's own application like
start in Windows?
In Windows, at the command prompt, one could type
start . and it would open a file browser for the current directory, or
start notepad and it would open a new notepad Window.
How to do this in Ubuntu?
Note I am not referring to typing a specific program name like
pinta drawing.png, but rather one-fits-all command instead, including one which can be used for file directories (that would be a good start)