ssh w/o passwd

**** su cephcool06

*******ssh-keygen

*******ssh-copy-id cephcool06@blade8
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
cephcool06@blade8's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'cephcool06@blade8'"
and check to make sure that only the key(s) you wanted were added.


******ssh blade8
Linux blade7 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64

The programs included with the BOSS GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

BOSS GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Sep  4 14:33:23 2014 from blade8
***** $ hostname
******* blade7

in my system(blade7)
vi /root/.ssh/config
Host blade8
        HostName 192.168.51.69
        User cephcool06
        port 22