Build ARM image

This tutorial's goal is to build a plug-and-play image for YunoHost for ARM boards.

It could be used on many ARM board (Rasberry Pi, Olimex, Cubieboard…).

This tutorial is based on Yunocubian.

You could find ARM image builder from Debian Jessie.

Download minimal Debian Jessie

Download a Debian Jessie image compatible with the hardware without desktop environnement installed:

ARMbian (Olimex, Cubieboard, Banana Pi…)
Raspbian Jessie Lite

Copy image and install YunoHost

Copy image to the SD card

Plug & boot

Connect via SSH: root@exemple.tld/ip_address with the password which you could find on respectives documentations.
You should be root for next operations.

Install YunoHost

Do not proceed to **post-installation**.

Clean image

Update image:

apt-get update && apt-get dist-upgrade && apt-get autoremove

Change hostname:

hostname -v YunoHost

Set new SSH key generation at first lauching:

# Delete SSH keys
rm -f /etc/ssh/ssh_host_*

# Add script to regenerate SSH keys at first boot
nano /etc/init.d/ssh_gen_host_keys
---
#!/bin/sh
### BEGIN INIT INFO
# Provides:          Generates new ssh host keys on first boot
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Generates new ssh host keys on first boot
# Description:       Generatesapt-get --purge clean new ssh host keys on $
### END INIT INFO
ssh-keygen -f /etc/ssh/ssh_host_rsa_key -t rsa -N ""
ssh-keygen -f /etc/ssh/ssh_host_dsa_key -t dsa -N ""
insserv -r /etc/init.d/ssh_gen_host_keys
rm -f \$0
---

# Give executable right
chmod a+x /etc/init.d/ssh_gen_host_keys

# Make it execute at next boot
insserv /etc/init.d/ssh_gen_host_keys

Delete logs:

find /var/log -type f -exec rm {} \;

Turn off your board:

shutdown

Copy image

Plug your SD card on your desktop computer and copy it:

Be carefull to not erase your data.

sudo dd bs=1M if=/dev/sdd of=~/yunohost-jessie-board-year-month-day.img

Verify image

Copy image to the SD card

Plug & boot

Post-install

If everything is alright, you could publish your image.

Publish image

Reduce size by zipping the image:

zip yunohost-jessie-board-year-month-day.img.zip yunohost-jessie-board-year-month-day.img

Publish: you could post your image on the forum.

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