OxyWiki

sudo flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo

wget -O- https://download.qgis.org/downloads/qgis-archive-keyring.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/qgis-archive-keyring.gpg

echo "deb [signed-by=/etc/apt/keyrings/qgis-archive-keyring.gpg] https://qgis.org/ubuntu $(lsb_release -c -s) main" | sudo tee /etc/apt/sources.list.d/qgis.list