这篇文章主要介绍Oracle Study在AIX环境下如何构建主机信任关系，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

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在AIX环境下构建主机信任关系选rsh，但在构建Oracle 11g RAC时需要ssh支持，以下文档介绍如何在AIX6.1下构建ssh的信任关系。

  默认aix没有安装ssh软件包，首先要安装ssh软件包：

1、下载、解压软件包

[root@aix209 ssh]#ls
OpenSSH_5.8.0.6102.tar.Z  openssl-0.9.8.1802.tar.Z  ssh.txt

解压后通过smit installs安装：

[root@aix209 ssh]#uncompress OpenSSH_5.8.0.6102.tar.Z
[root@aix209 ssh]#uncompress openssl-0.9.8.1802.tar.Z
[root@aix209 ssh]#ls
OpenSSH_5.8.0.6102.tar  openssl-0.9.8.1802.tar  ssh.txt
[root@aix209 ssh]#tar xvf OpenSSH_5.8.0.6102.tar

x openssh.base, 6310912 bytes, 12326 tape blocks x openssh.license, 338944 bytes, 662 tape blocks x openssh.man.en_US, 153600 bytes, 300 tape blocks x openssh.msg.CA_ES, 20480 bytes, 40 tape blocks x openssh.msg.CS_CZ, 20480 bytes, 40 tape blocks x openssh.msg.DE_DE, 20480 bytes, 40 tape blocks x openssh.msg.EN_US, 17408 bytes, 34 tape blocks x openssh.msg.ES_ES, 19456 bytes, 38 tape blocks x openssh.msg.FR_FR, 20480 bytes, 40 tape blocks x openssh.msg.HU_HU, 21504 bytes, 42 tape blocks x openssh.msg.IT_IT, 19456 bytes, 38 tape blocks x openssh.msg.JA_JP, 24576 bytes, 48 tape blocks x openssh.msg.Ja_JP, 26624 bytes, 52 tape blocks x openssh.msg.KO_KR, 21504 bytes, 42 tape blocks x openssh.msg.PL_PL, 20480 bytes, 40 tape blocks x openssh.msg.PT_BR, 19456 bytes, 38 tape blocks x openssh.msg.RU_RU, 25600 bytes, 50 tape blocks x openssh.msg.SK_SK, 20480 bytes, 40 tape blocks x openssh.msg.ZH_CN, 25600 bytes, 50 tape blocks x openssh.msg.ZH_TW, 24576 bytes, 48 tape blocks x openssh.msg.Zh_CN, 21504 bytes, 42 tape blocks x openssh.msg.Zh_TW, 21504 bytes, 42 tape blocks x openssh.msg.ca_ES, 19456 bytes, 38 tape blocks x openssh.msg.cs_CZ, 19456 bytes, 38 tape blocks x openssh.msg.de_DE, 20480 bytes, 40 tape blocks x openssh.msg.en_US, 17408 bytes, 34 tape blocks x openssh.msg.es_ES, 19456 bytes, 38 tape blocks x openssh.msg.fr_FR, 20480 bytes, 40 tape blocks x openssh.msg.hu_HU, 27648 bytes, 54 tape blocks x openssh.msg.it_IT, 19456 bytes, 38 tape blocks x openssh.msg.ja_JP, 26624 bytes, 52 tape blocks x openssh.msg.ko_KR, 19456 bytes, 38 tape blocks x openssh.msg.pl_PL, 27648 bytes, 54 tape blocks x openssh.msg.pt_BR, 18432 bytes, 36 tape blocks x openssh.msg.ru_RU, 27648 bytes, 54 tape blocks x openssh.msg.sk_SK, 19456 bytes, 38 tape blocks x openssh.msg.zh_CN, 21504 bytes, 42 tape blocks x openssh.msg.zh_TW, 21504 bytes, 42 tape blocks

[root@aix209 ssh]#ls

OpenSSH_5.8.0.6102.tar  openssh.msg.IT_IT       openssh.msg.Zh_TW       openssh.msg.pl_PL openssh.base            openssh.msg.JA_JP       openssh.msg.ca_ES       openssh.msg.pt_BR openssh.license         openssh.msg.Ja_JP       openssh.msg.cs_CZ       openssh.msg.ru_RU openssh.man.en_US       openssh.msg.KO_KR       openssh.msg.de_DE       openssh.msg.sk_SK openssh.msg.CA_ES       openssh.msg.PL_PL       openssh.msg.en_US       openssh.msg.zh_CN openssh.msg.CS_CZ       openssh.msg.PT_BR       openssh.msg.es_ES       openssh.msg.zh_TW openssh.msg.DE_DE       openssh.msg.RU_RU       openssh.msg.fr_FR       openssl-0.9.8.1802.tar openssh.msg.EN_US       openssh.msg.SK_SK       openssh.msg.hu_HU       ssh.txt openssh.msg.ES_ES       openssh.msg.ZH_CN       openssh.msg.it_IT openssh.msg.FR_FR       openssh.msg.ZH_TW       openssh.msg.ja_JP openssh.msg.HU_HU       openssh.msg.Zh_CN       openssh.msg.ko_KR

[root@aix209 ssh]#tar xvf OpenSSH_5.8.0.6102.tar

x openssh.base, 6310912 bytes, 12326 tape blocks x openssh.license, 338944 bytes, 662 tape blocks x openssh.man.en_US, 153600 bytes, 300 tape blocks x openssh.msg.CA_ES, 20480 bytes, 40 tape blocks x openssh.msg.CS_CZ, 20480 bytes, 40 tape blocks x openssh.msg.DE_DE, 20480 bytes, 40 tape blocks x openssh.msg.EN_US, 17408 bytes, 34 tape blocks x openssh.msg.ES_ES, 19456 bytes, 38 tape blocks x openssh.msg.FR_FR, 20480 bytes, 40 tape blocks x openssh.msg.HU_HU, 21504 bytes, 42 tape blocks x openssh.msg.IT_IT, 19456 bytes, 38 tape blocks x openssh.msg.JA_JP, 24576 bytes, 48 tape blocks x openssh.msg.Ja_JP, 26624 bytes, 52 tape blocks x openssh.msg.KO_KR, 21504 bytes, 42 tape blocks x openssh.msg.PL_PL, 20480 bytes, 40 tape blocks x openssh.msg.PT_BR, 19456 bytes, 38 tape blocks x openssh.msg.RU_RU, 25600 bytes, 50 tape blocks x openssh.msg.SK_SK, 20480 bytes, 40 tape blocks x openssh.msg.ZH_CN, 25600 bytes, 50 tape blocks x openssh.msg.ZH_TW, 24576 bytes, 48 tape blocks x openssh.msg.Zh_CN, 21504 bytes, 42 tape blocks x openssh.msg.Zh_TW, 21504 bytes, 42 tape blocks x openssh.msg.ca_ES, 19456 bytes, 38 tape blocks x openssh.msg.cs_CZ, 19456 bytes, 38 tape blocks x openssh.msg.de_DE, 20480 bytes, 40 tape blocks x openssh.msg.en_US, 17408 bytes, 34 tape blocks x openssh.msg.es_ES, 19456 bytes, 38 tape blocks x openssh.msg.fr_FR, 20480 bytes, 40 tape blocks x openssh.msg.hu_HU, 27648 bytes, 54 tape blocks x openssh.msg.it_IT, 19456 bytes, 38 tape blocks x openssh.msg.ja_JP, 26624 bytes, 52 tape blocks x openssh.msg.ko_KR, 19456 bytes, 38 tape blocks x openssh.msg.pl_PL, 27648 bytes, 54 tape blocks x openssh.msg.pt_BR, 18432 bytes, 36 tape blocks x openssh.msg.ru_RU, 27648 bytes, 54 tape blocks x openssh.msg.sk_SK, 19456 bytes, 38 tape blocks x openssh.msg.zh_CN, 21504 bytes, 42 tape blocks x openssh.msg.zh_TW, 21504 bytes, 42 tape blocks

2、通过smit installs安装：
[root@aix209 ssh]#smit installs

3、安装成功后，系统自动启动ssh service：
[root@aix209 ssh]#l***c -a |grep ssh
 sshd       ssh        6029368    active

4、配置信任关系（通过建立公钥和私钥）
[grid@aix209 grid]$ssh-keygen -t rsa

Generating public/private rsa key pair. Enter file in which to save the key (/home/grid/.ssh/id_rsa):  Created directory '/home/grid/.ssh'. Enter passphrase (empty for no passphrase):  Enter same passphrase again:  Your identification has been saved in /home/grid/.ssh/id_rsa. Your public key has been saved in /home/grid/.ssh/id_rsa.pub. The key fingerprint is: 46:8c:ac:aa:82:62:b1:5e:e2:ba:ed:d5:02:5e:f5:62 grid@aix209 The key's randomart p_w_picpath is: +--[ RSA 2048]----+ |                 | |     . o         | |      + o        | |     o o         | |  . o E S        | | o + o o         | |..=.o .          | |==o. .           | |X=o              | +-----------------+

[grid@aix209 grid]$ssh-keygen -t dsa

Generating public/private dsa key pair. Enter file in which to save the key (/home/grid/.ssh/id_dsa):  Enter passphrase (empty for no passphrase):  Enter same passphrase again:  Your identification has been saved in /home/grid/.ssh/id_dsa. Your public key has been saved in /home/grid/.ssh/id_dsa.pub. The key fingerprint is: 4a:6d:60:35:ee:1c:fe:7d:62:54:f6:31:5c:7b:4a:54 grid@aix209 The key's randomart p_w_picpath is: +--[ DSA 1024]----+ |        o     ..E| |       o .   .. o| |      o o     +=.| |     . * .   + o+| |      . S   . . .| |     . o . o     | |      .   . + .  | |           . o   | |                 | +-----------------+

[grid@aix209 ~]$cd .ssh
[grid@aix209 .ssh]$ls
id_dsa    id_dsa.pub  id_rsa    id_rsa.pub
[grid@aix209 .ssh]$cd ..

在另一个node（aix210）同样方式建立密钥对：

[grid@aix210 grid]$ssh-keygen -trsa

[grid@aix210 grid]$ssh-keygen -tdsa

[grid@aix209 ~]$cat .ssh/id_rsa.pub >>.ssh/authorized_keys
[grid@aix209 ~]$cat .ssh/id_dsa.pub >>.ssh/authorized_keys
[grid@aix209 ~]$ssh aix210 cat .ssh/id_rsa.pub >>.ssh/authorized_keys
The authenticity of host 'aix210 (192.168.8.210)' can't be established.
RSA key fingerprint is 65:25:9b:46:05:a4:84:73:76:d2:ba:d2:c8:a2:91:0e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix210,192.168.8.210' (RSA) to the list of known hosts.
grid@aix210's password: 
[grid@aix209 ~]$ssh aix210 cat .ssh/id_dsa.pub >>.ssh/authorized_keys
grid@aix210's password:

将公钥authorized_keys上传到对方主机：
[grid@aix209 ~]$scp .ssh/authorized_keys aix210:~/.ssh
grid@aix210's password: 
authorized_keys                               100% 1988   1.9KB/s  00:00

验证：

[grid@aix209 ~]$ssh aix210 date
Mon Jan  5 22:24:19 CST 1970
[grid@aix209 ~]$ssh aix210-priv date
The authenticity of host 'aix210-priv (10.10.10.210)' can't be established.
RSA key fingerprint is 65:25:9b:46:05:a4:84:73:76:d2:ba:d2:c8:a2:91:0e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix210-priv,10.10.10.210' (RSA) to the list of known hosts.
Mon Jan  5 22:24:27 CST 1970
[grid@aix209 ~]$ssh aix209-priv date
The authenticity of host 'aix209-priv (10.10.10.209)' can't be established.
RSA key fingerprint is 8f:54:98:0e:1b:c1:81:10:36:88:62:e2:20:61:16:91.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix209-priv,10.10.10.209' (RSA) to the list of known hosts.
Mon Mar 28 18:39:55 CDT 2016
[grid@aix209 ~]$ssh aix209 date
The authenticity of host 'aix209 (192.168.8.209)' can't be established.
RSA key fingerprint is 8f:54:98:0e:1b:c1:81:10:36:88:62:e2:20:61:16:91.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix209,192.168.8.209' (RSA) to the list of known hosts.
Mon Mar 28 18:40:02 CDT 2016

[grid@aix210 ~]$ssh aix209 date
The authenticity of host 'aix209 (192.168.8.209)' can't be established.
RSA key fingerprint is 8f:54:98:0e:1b:c1:81:10:36:88:62:e2:20:61:16:91.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix209,192.168.8.209' (RSA) to the list of known hosts.
Mon Mar 28 18:40:30 CDT 2016
[grid@aix210 ~]$ssh aix209-priv date
The authenticity of host 'aix209-priv (10.10.10.209)' can't be established.
RSA key fingerprint is 8f:54:98:0e:1b:c1:81:10:36:88:62:e2:20:61:16:91.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix209-priv,10.10.10.209' (RSA) to the list of known hosts.
Mon Mar 28 18:40:36 CDT 2016
[grid@aix210 ~]$ssh aix210-priv date
The authenticity of host 'aix210-priv (10.10.10.210)' can't be established.
RSA key fingerprint is 65:25:9b:46:05:a4:84:73:76:d2:ba:d2:c8:a2:91:0e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix210-priv,10.10.10.210' (RSA) to the list of known hosts.
Mon Jan  5 22:25:26 CST 1970
[grid@aix210 ~]$ssh aix210 date
The authenticity of host 'aix210 (192.168.8.210)' can't be established.
RSA key fingerprint is 65:25:9b:46:05:a4:84:73:76:d2:ba:d2:c8:a2:91:0e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'aix210,192.168.8.210' (RSA) to the list of known hosts.
Mon Jan  5 22:25:31 CST 1970

。。。验证通过，信任关系建立成功！

------  在构建Oracle RAC时，需要Oracle用户也要建立信任关系 。。。

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