I am trying to connect to my BBB via ssh-keypair-authentifcation (from my 
Windows machine). The regular user/pwd-login works, but somehow I'm stuck 
with the keypair method. My aim would be to connect to the static 
IP-address of my BBB (192.168.1.175) resp. USB (192.168.7.2) with keypair 
(as the user ubuntu).

I have on my Win-machine TeraTerm as SSH-client installed. I can generate 
on my Win-machine a keypair. To my understanding I should now put the 
public key (ub_user.pub) on my BBB and use the private key as 
authentication. But this fails somehow cause I guess I'm missing some 
essential points. 

For the case via USB I try something 

ubuntu@BBB:~$ ssh-copy-id -i [email protected] 

I get an endless blinking cursor. I guess I need to verify my credentials 
but this fails. And I wonder anyway how the ssh should know which 
public-file to use. Could somebody please help and give me a hint what to 
do with the public-key-file?

My second question is the curiosity reg. the pub-key-file. For the login 
procedure I specify only the private-key file. How does the host (BBB) know 
from where to take the pub-key-files? To my understanding they are stored 
per each user which would mean, that the ssh scans through each user-dir 
(what I doubt).

And last question: Can I use the same (public) key for different 
connections? Namely to use it for USB-connection as well as for 
eth0-connection.

Help would be really appreciated ...

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