Server use notes 
passwordless ssh/
must set up the key on[name your embedded board here ] LUMIN.

you need to get both scp and ssh access to the server and have done the public key and even tested scp a entire directory.

I need to create a private DSA KEY (id_pub.dsa) in homedir of user who will do the transfer, on the client , then copy that key to server, intosameusername home dir as /home/username/.ssh/authorized_keys file ... then we can use scp or rsync+ssh or sftp without password auth (autologin)

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That is why autologin and for that we need to add the Lumin box SSH DSA user KEY to authorized_hosts on server , very simple.

ie
ssh USER***@isp.v2.nl [4115]
Password:
Linux isp 2.6.21.1 #1 SMP Fri May 18 15:57:26 CEST 2007 i686 GNU/Linux

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

Last login: Sat Mar 15 13:20:26 2008 from ip

This account is restricted by rssh.
Allowed commands: scp sftp

If you believe this is in error, please contact your system administrator.

Connection to isp.v2.nl closed.

SOLUTION ry to as said , crate dir and key locally and scp -Rv that to "auto-home-dir" of user and see if it works?

What we need to do is login as root , create upload user same as the credits You have for the server, make homedir + ssh key, then upload that to server ...
from then on ssh ( scp sftp ) shall not ask for password anymore .... at leastinthe normal UNIX world.
[Fri Jun 27 2008 16:30:14] … ( You see ,ssh so called subsystems (scp/sftp) all check users homedir .ssh/authorized_keys or hosts and if some key is there they use it for AUTH method, and if match, voila , autologin.)