Hello guys. I need prepare a lot of cards. Is there any way how to chroot img? I use this setup for raspbian http://sentryytech.blogspot.cz/2013/02/faster-compiling-on-emulated-raspberry.html but armbian have only one partition and that is too much voodoo for me.

I don't quite understand your question.

 

Please read the documentation first.

http://www.armbian.com/documentation/

 

Than it would be perhaps simpler to ask a right question too.

if you need to use chroot for whatever and have an image-file with only one partition:

 

1) (sudo) fdisk -l /path/to/image.img

 

this will tell you the blocksize (usually 512 byte) and the startblock (lets say 2048)

 

2) (sudo) mount /path/to/image.img -o offset=$((512 * 2048)) /path/to/mount    ((yey, there are the 512 and 2048 again...)

 

3) now you can follow your mentioned guide again...  (copy the qemu-arm-static, mount -o bind the dev, sys and proc and so on....)

 

 

But just for curiosity: Why you need chroot when getting a complete image?