01-11-2008
With ssh, the trick is not to give more permissions, but to reduce them! If your .ssh directory or authorized_keys is writable for whole world, then it isn't exactly secure - so ssh will see that and ask you for password.
Check what are the permissions for .ssh directory on A and B. Make them 700 (if not done already) and retry.
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LEARN ABOUT LINUX
ssh-import-id
ssh-import-id(1) ssh-import ssh-import-id(1)
NAME
ssh-import-id - retrieve one or more public keys from a public keyserver (Launchpad.net by default) and append them to the current user's
authorized_keys file (or some other specified file)
SYNOPSIS
ssh-import-id [options] USER_ID_1 [USER_ID_2] ... [USER_ID_n]
OPTIONS
-h | --help usage
-o | --output F write output to file 'F' (default ~/.ssh/authorized_keys, use "-" for standard out)
DESCRIPTION
This utility will securely contact a public keyserver (https://launchpad.net by default) and retrieve one or more user's public keys, and
append these to the current user's ~/.ssh/authorized_keys file.
The system administrator can change the source URL used by ssh-import-id(1) by editing the configuration file, /etc/ssh/ssh_import_id,
which is sourced to obtain the value of URL. By default, URL="https://launchpad.net/~%s/+sshkeys". Note that this url really MUST be a
secure, https url with a valid, signed certificate or else your system will be vulnerable to man-in-the-middle attacks! The "%s" will be
populated by ssh-import-id(1) with the value(s) of USER_ID_1 [USER_ID_2] ... [USER_ID_n].
SEE ALSO
ssh(1)
FILES
/etc/ssh/ssh_import_id
AUTHOR
This manpage and the utility was written by Dustin Kirkland <kirkland@canonical.com> for Ubuntu systems (but may be used by others). Per-
mission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 3 published
by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
ssh-import 23 Feb 2010 ssh-import-id(1)