AMD64
curl -fsSL https://dl.osspkg.com/key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/osspkg.gpg
sudo chmod a+r /etc/apt/keyrings/osspkg.gpg
sudo tee /etc/apt/sources.list.d/osspkg.list <<'EOF'
deb [arch=amd64 signed-by=/etc/apt/keyrings/osspkg.gpg] https://dl.osspkg.com/ stable main
EOF
sudo apt update
ARM64
curl -fsSL https://dl.osspkg.com/key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/osspkg.gpg
sudo chmod a+r /etc/apt/keyrings/osspkg.gpg
sudo tee /etc/apt/sources.list.d/osspkg.list <<'EOF'
deb [arch=arm64 signed-by=/etc/apt/keyrings/osspkg.gpg] https://dl.osspkg.com/ stable main
EOF
sudo apt update