Armbian

Armbian is a base operating system platform for single board computers (SBCs) that other projects can trust to build upon.

Lightweight Debian or Ubuntu based linux distribution specialized for ARM development boards
Each system is compiled, assembled and optimized by Armbian Build Tools
It has powerful build and software development tools to make custom builds
A vibrant community

Common features

Armbian Linux is availble as Debian and Ubuntu based images, compiled from scratch
Images are reduced to actual data size and automatically resized at first boot
Root password is 1234. You are forced to change this password and (optional) create a normal user at first login
Ethernet adapter with DHCP and SSH server ready on default port (22)
Wireless adapter with DHCP ready (if present) but disabled. You can use armbian-config to connect to your router or create an AP
NAND, SATA, eMMC and USB install script is included (nand-sata-install)
Upgrades are done via standard apt upgrade method
Login script shows: board name with large text, distribution base, kernel version, system load, uptime, memory usage, IP address, CPU and drive temperature, ambient temperature from Temper if exits, SD card usage, battery conditions and number of updates to install