大家帮忙看下免密码登录的问题

[root@about03 .ssh]# ls
authorized_keys  id_rsa  id_rsa.pub  known_hosts
[root@about03 .ssh]# cd ..
[root@about03 ~]# ssh-copy-id about04
root@about04's password:
Now try logging into the machine, with "ssh 'about04'", and check in:

  .ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

[root@about03 ~]# ssh about04
root@about04's password:
Last login: Sun Feb  8 20:29:03 2015 from about01
[root@about04 ~]#

查看about04
[root@about04 .ssh]# more authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAsyl4qxBL9DuIUTr2kaNIEb1AhAwqDVvht4G1SWHe4mBQAe1iTMy
ZM4E8xABP8bQxTP/W+soMGkHY8uJakx7vhKE9TsKtg9Nat4+qJp13vwCKm4ql07IsWjdCkYc6zgHmuFECxgvzW7
QRNALMCoAA+3rUNHsWqcVEGR+a72SIxx81751zzGQPSiuEW7DBQGr3f5fDKR3cFaadsO7P/h6EEWQct3rmT4eVp
uWIj8+O+85jGDhTU8Z1iTcP4rUhJozqHxz+QluFzXwPO4DxPMoRmdmwXv/bcs2izdGBBn9WJWdE5utRbP8fDs73
Uw11JiClL8AfQmLmeAffRyDE9xF03Q== root@about01
The agent has no identities.
[root@about04 .ssh]#