centos6.5配置ssh免秘钥登陆执行pssh命令的讲解

  [root@bogon ]# pssh -H root@192.168.245.129 -i uptime  [1] 11:00:36 [FAILURE] root@192.168.245.129 Exited with error code 255  Stderr: The authenticity of host '192.168.245.129 (192.168.245.129)' can't be established.  RSA key fingerprint is 84:2d:70:33:1c:45:fa:e6:4b:94:72:7e:10:98:7c:a8.  Are you sure you want to continue connecting (yes/no)?   Host key verification failed.

  [root@bogon tmp]# ssh-keygen -t rsa  Generating public/private rsa key pair.  Enter file in which to save the key (/root/.ssh/id_rsa):   Enter passphrase (empty for no passphrase):   Enter same passphrase again:   Your identification has been saved in /root/.ssh/id_rsa.  Your public key has been saved in /root/.ssh/id_rsa.pub.  The key fingerprint is:  9e:14:9a:cc:8d:9b:fd:51:c5:68:24:e1:ce:c6:d7:33 root@bogon  The key's randomart image is:  +--[ RSA 2048]----+  |     o..  |  |     . o o  |  |    . . o o |  |   o = = . o  |  |   * S = o E |  |    * o o  o |  |   o + .   |  |     . .   |  |     .   |  +-----------------+

  [root@bogon .ssh]# ll  total 8  -rw------- 1 root root 1675 Aug 22 11:06 id_rsa  -rw-r--r-- 1 root root 392 Aug 22 11:06 id_rsa.pub

  [root@bogon .ssh]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.245.129  The authenticity of host '192.168.245.129 (192.168.245.129)' can't be established.  RSA key fingerprint is 84:2d:70:33:1c:45:fa:e6:4b:94:72:7e:10:98:7c:a8.  Are you sure you want to continue connecting (yes/no)? yes  Warning: Permanently added '192.168.245.129' (RSA) to the list of known hosts.  reverse mapping checking getaddrinfo for bogon [192.168.245.129] failed - POSSIBLE BREAK-IN ATTEMPT!  root@192.168.245.129's password:   Now try logging into the machine, with "ssh 'root@192.168.245.129'", and check in:   .ssh/authorized_keys  to make sure we haven't added extra keys that you weren't expecting.

  [root@bogon .ssh]# pssh -H root@192.168.245.129 -i uptime  [1] 11:10:39 [SUCCESS]  20:10:39 up 2:07, 1 user, load average: 0.00, 0.00, 0.00