# Linux example: /dev/sdx is your sd card device
sudo dd bs=1M if=filename.raw of=/dev/sdx
sudo sync
sudo umount /dev/sdx

Change /dev/sdx to your sd card device (don't specify a partition like /dev/sdx1. dd will write the image to your sd card but the result is a broken boot medium).

Default user: root
Password: 1234

Armbian request to create a new user and change the default password for root on the first startup.

sudo su
dpkg-reconfigure keyboard-configuration
dpkg-reconfigure locales
dpkg-reconfigure tzdata
reboot
apt-get update
apt-get upgrade

Change hostname from bananapipro to a custom name.

sudo su
# edit /etc/hostname
nano /etc/hostname
 
#edit /etc/hosts and change all "bananapipro" to your new hostname
nano /etc/hosts
 
  #old:
  #127.0.0.1   localhost bananapipro
  #::1         localhost bananapipro ip6-localhost ip6-loopback
 
  #new:
  127.0.0.1   localhost myhostname
  ::1         localhost myhostname ip6-localhost ip6-loopback
  fe00::0     ip6-localnet
  ff00::0     ip6-mcastprefix
  ff02::1     ip6-allnodes
  ff02::2     ip6-allrouters
 
# restart the system
reboot

Update ssh keys

sudo rm /etc/ssh/ssh_host_*
sudo dpkg-reconfigure openssh-server

Disable ssh root login

sudo nano /etc/ssh/sshd_config
# alter option
PermitRootLogin no
AllowUsers <user1> <user2> <user3>