root@ubuntu-phablet:/home/hablet# apt-get install openssh-server
W: Not using locking for read only lock file /var/lib/dpkg/lock
E: Unable to write to /var/cache/apt
E: The package lists or status file could not be parsed or opened.

adb shell

su - phablet

echo | sudo tee /etc/init/ssh.override

echo "manual" | sudo tee /etc/init/ssh.override

adb shell android-gadget-service enable ssh

adb shell mkdir /home/phablet/.ssh
adb push ~/.ssh/id_rsa.pub /home/phablet/.ssh/authorized_keys
adb shell chown -R phablet.phablet /home/phablet/.ssh
adb shell chmod 700 /home/phablet/.ssh
adb shell chmod 600 /home/phablet/.ssh/authorized_keys

adb shell ip addr show wlan0|grep inet
ssh phablet@<IP from above command>

touch /userdata/.writable_image

sudo setprop persist.service.ssh true
mkdir -pm700 ~/.ssh
ip addr
nc -l -p 1234 > ~/.ssh/authorized_keys

nc 192.0.2.1 1234 < ~/.ssh/id_rsa.pub

ssh phablet@192.0.2.1