Some Shell Commands Tips of Ubuntu Touch.
$ adb shell
$ sudo touch /userdata/.writable_image
$ sudo reboot
$ syncevolution --import /home/phablet/Documents/utouch.vcf backend=evolution-contacts
$ syncevolution --export /home/phablet/Documents/utcontacts.vcf backend=evolution-contacts
$ /usr/share/ofono/scripts/send-sms /ril_0 +86134xxxxxxxx "Hello, I am Mutse Young and use ubuntu phone to send SMS to you." 0
$ adb push uappname.author_version.click /home/phablet/Downloads/
$ adb shell "sudo -iu phablet pkcon --allow-untrusted install-local /home/phablet/Downloads/uappname.author_version.click"
$ sudo system-image-cli --switch ubuntu-touch/rc-proposed/ubuntu --build 0
$ adb shell tar -czpf /tmp/backup.tar.gz /home/phablet
/etc/NetworkManager/system-connections
$ adb pull /tmp/backup.tar.gz .
$ adb push backup.tar.gz /tmp
$ adb shell tar -xzpf /tmp/backup.tar.gz -C /