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Full Discussion: How to use rsa key for a different user?
Operating Systems Linux Red Hat How to use rsa key for a different user? Post 302877142 by Scott on Thursday 28th of November 2013 11:28:02 AM
Old 11-28-2013
The steps you describe sound fine. It's possibly the permissions on the key file.

Code:
# On server B
[root@vmb ~]# useradd user2
[root@vmb ~]# passwd user2
Changing password for user user2.
New password: 
Retype new password: 
passwd: all authentication tokens updated successfully.

# On server A
[root@vma ~]# useradd user1
[root@vma ~]# su - user1
[user1@vma ~]$ ssh-keygen
...

[user1@vma ~]$ ssh-copy-id user2@vmb
The authenticity of host 'vmb (10.10.10.172)' can't be established.
RSA key fingerprint is dd:5a:88:65:38:67:42:3a:ef:63:2b:97:34:c1:ab:52.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'vmb,10.10.10.172' (RSA) to the list of known hosts.
user2@vmb's password: 
...
[user1@vma ~]$ ssh user2@vmb
[user2@vmb ~]$

This User Gave Thanks to Scott For This Post:
snailrider
 

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LEARN ABOUT DEBIAN

dropbearkey

dropbearkey(8)						      System Manager's Manual						    dropbearkey(8)

NAME

       dropbearkey - create private keys for the use with dropbear(8)

SYNOPSIS

       dropbearkey -t type -f file [-s bits] [-y]

DESCRIPTION

       dropbearkey generates a RSA or DSS format SSH private key, and saves it to a file for the use with the dropbear(8) SSH 2 server.  Note that
       some SSH implementations use the term "DSA" rather than "DSS", they mean the same thing.

OPTIONS

       -t type
	      Type of key to generate.	Must be one of rsa or dss.

       -f file
	      Write the secret key to the file file.

       -s bits
	      Set the key size to bits bits, should be multiple of 8 (optional).

       -y     Just print the publickey and fingerprint for the private key in file.

EXAMPLE

       generate a host-key:
	# dropbearkey -t rsa -f /etc/dropbear/dropbear_rsa_host_key

       extract a public key suitable for authorized_keys from private key:
	# dropbearkey -y -f id_rsa | grep "^ssh-rsa " >> authorized_keys

AUTHOR

       Matt Johnston (matt@ucc.asn.au).
       Gerrit Pape (pape@smarden.org) wrote this manual page.

SEE ALSO

       dropbear(8), dbclient(1)

       http://matt.ucc.asn.au/dropbear/dropbear.html

																    dropbearkey(8)
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