Thanks Jim,
You are always a good helper. I followed your instruction and please
see my comment below.
Tom
> Ok I've checked this, and it appears that dropbear supports the same
> key authorised access as openssh.
>
> On your client machine (the one you are going to use to ssh to your
remote
> ts72xx board) you need to create a public/private key pair. Using
openssh
> this is done e.g. by
>
> $ ssh-keygen -t rsa
> Generating public/private rsa key pair.
> Enter file in which to save the key (/home/jj/.ssh/id_rsa):
> Enter passphrase (empty for no passphrase):
> Enter same passphrase again:
> Your identification has been saved in /home/jj/.ssh/id_rsa.
> Your public key has been saved in /home/jj/.ssh/id_rsa.pub.
> The key fingerprint is:
> 1c:5d:91:47:33:ae:bb:2d:00:74:44:ed:ff:0a:75:b2
>
Are you in root mode on host PC or do you have a "jj" account in the
board?
> Make sure you just press <return> for the passphrase (twice :-).
> This creates an unencrypted private key in ~/.ssh/id_rsa so it is
> important that you keep this file secret. Make sure the permissions
> only allow you to read the file.
>
> It also creates the matching public key in ~/.ssh/id_rsa.pub
> The public is just that - public and it doesn't matter who sees this.
>
> You must now copy your public key in the file ~/.ssh/authorized_keys
> or, if this file already exists, copy the public key to the end of that
> file - there can be many public keys that authorise you access.
>
> you should be able now to remote login without a password, or run
commands
> remotely without a password.
>
Perhaps you forgot to mention that you used someway to copy the
authorized_keys to the board.
I googled ssh on the web and found that this is a must. Otherwise,
remote host could not be recognized. Where did you save the public key
on the board?
http://kimmo.suominen.com/docs/ssh/ is a good how-to tutorial.
>From root mode, I tried to use "$ scp authorized_keys
". Though I did not get any error msg, the
authorized_keys could not be copied by scp.
Finally I had to use NFS to copy to board. Now, I can login in to
board without password. But I have to use root mode on host PC.
I have tried a lot tonight, scp still does not work.
> I believe dropbear also does some port forwarding, and would guess that
> this works as per openssh, though I've done no testing.
>
> All the testing I did was for Dropbear sshd v0.44test4
>
> HTH
> Jim
>
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