Gloobus preview (quick-look) Ubuntu 16.10
Source: webupd8.org
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4 sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt update
sudo apt install gloobus-preview unoconv gnumeric gloobus-sushi
nautilus -q
1.0 Add repo & update apt db
2.0 install:
2.1 gloobus-preview :: main package
2.2 unoconv gnumeric :: conversion assistants
2.3 gloobus-sushi :: integration helper tool for file manager
3.0 restart file manager (nautilus)
Select the file, press for the preview.