Install fonts-oxygen by entering the following commands in the terminal:
sudo apt update sudo apt install fonts-oxygen
Description:
Oxygen font family
Desktop/gui font family for integrated use with the KDE desktop. . The basic concept for Oxygen Font is to design a clear, legible, sans serif font which would be rendered with Freetype on Linux-based devices. In addition a bold weight, plus regular and bold italics, and a monospace version will be made.
Homepage: https://cgit.kde.org/oxygen-fonts.git
Version: 4:5.4.3-3
Section: universe/fonts