The Nexus 9 is an odd, compromised tablet, and way too expensive, but combined with the folio keyboard & pocketwifi it makes a nice ssh terminal for use on the road.
Various ssh apps like ConnectBot have terrible external keyboard support. So I compiled a static dropbear binary and static busybox, and I’m using those with Android Terminal Emulator.
The tablet has a 64 bit ARM processor (actually it’s way stranger than that – it uses a proprietary VLIW core with Transmeta-style code morphing in software). I used my AArch64 Fedora machine to compile the static binaries which I copied across.
I changed the default shell to busybox ash and added a bunch of start-up scripts to make Android more bearable.
It all works except nsswitch (user & DNS resolution) because of glibc static brokenness.
Richard WM Jones 
could you share the binary?
No – if I post the binary then I’ll feel I have to keep it up to date and so on, especially for security-sensitive binaries like ssh. You can easily build it under qemu, see https://rwmj.wordpress.com/2015/02/27/how-to-boot-a-fedora-21-aarch64-uefi-guest-on-x86_64/
Got that.
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