xdg-open fails to open file

I was trying to open an Excel file with python on Linux using xdg-open but realized xdg-open doesn’t really work on my machine: $ xdg-open ~/Documents/foo.xlsx /usr/bin/xdg-open: line 881: www-browser: command not found /usr/bin/xdg-open: line 881: links2: command not found /usr/bin/xdg-open: line 881: elinks: command not found /usr/bin/xdg-open: line 881: links: command not found /usr/bin/xdg-open:…

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how can we install the most appropriated sound driver (kernel module, i guess)?

The actual situation is this: in the same computer, in one partition is a fresh-installed Ubuntu 19.10, with the closest sound driver installed (allowing stereo, volume amplification, etc., really great for my needs), and in another is Xubuntu dist-upgraded to 19.10, with generic sound, mono and without amplification (very low volume when it is 100%,…

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