centos6.5配置ssh免秘钥登陆执行pssh命令的讲解

1.检查并安装pssh，yum list pssh

2.因为没有配置免秘钥登陆，pssh命令执行失败。

[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 255Stderr: 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.

3.生成秘钥。

[root@bogon tmp]# ssh-keygen -t rsaGenerating 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@bogonThe key's randomart image is:+--[ RSA 2048]----+|     o..  ||     . o o  ||    . . o o ||   o = = . o  ||   * S = o E ||    * o o  o ||   o + .   ||     . .   ||     .   |+-----------------+

[root@bogon .ssh]# lltotal 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

4.拷贝到被管对象。

[root@bogon .ssh]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.245.129The 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)? yesWarning: 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_keysto make sure we haven't added extra keys that you weren't expecting.

5.pssh命令执行成功。

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

总结

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