Install .deb file through apt:
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Rather then using "dpkg -i", witch does not get dependencies,
or KDE's qapt, which is very slow, 
you can use apt to get dependencies and be much quicker then qapt.

Command:
sudo apt install ./[deb_path]

Example:
sudo apt install ./home/angelo/Downloads/package.deb

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Source: https://www.osradar.com/differtent-ways-install-deb-package-terminal/
Date: March 26th, 2021