$ curl -fsSL https://deb.ayufan.eu/orgs/ayufan-pine64/archive.key | sudo apt-key add -
$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 stretch releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 jessie releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 xenial releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 bionic releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 stretch releases pre-releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 jessie releases pre-releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 xenial releases pre-releases"$ sudo add-apt-repository "deb https://deb.ayufan.eu/orgs/ayufan-pine64 bionic releases pre-releases"$ sudo apt-get update