Hello,
I want to connect via sftp without success.

    On FAQ openssh.org I find some information about.

    2.9 - sftp/scp fails at connection, but ssh is OK.

    sftp and/or scp may fail at connection time if you have shell
    initialization (.profile, .bashrc, .cshrc, etc) which produces
    output for non-interactive sessions. This output confuses the
    sftp/scp client. You can verify if your shell is doing this by
    executing:

        *ssh yourhost /usr/bin/true*

    If the above command produces any output, then you need to modify
    your shell initialization.


I think that is a major problem witch should be solved generally for the 
images produced by yocto.


So I ask here ;)

regards

Joerg