07-28-2016, 08:31 AM
It is a normal Ubuntu Xenial release, so you can use any guides for adding repos you find for Ubuntu. As for the availability of packages, not all packages are built or work on the ARM64 architecure (arm64, aarch64). There was not a lot of hardware around yet for distros to test their packages on but that should improve now that the Pine and other arm64 SBCs appear on the market. You can run 32bit (armhf) binaries on your Ubuntu if you install multiarch support, but it is not always easy to do, since you need to install every single dependency of a package in the matching architecture as well, and sometimes things break.
Come have a chat in the Pine IRC channel >>