This will **EXPIRE** the root password. If you run this you can **NOT** login as root!!! Use with care if you're not used to sudo and/or want to retain root login for some reason.
``` bash
passwd -l root
```
## Cleanup fstab
Edit ```/etc/fstab``` and remove the ```commit=600``` block from the root filesystem definition.
## Reboot
This is necessary for the armbian setup to finish resizing the filesystem stored on the sd card.