配置節點間的SSH信任關係

（1）在節點1上

oracle@node1:~ > pwd

/home/oracle

oracle@node1:~ > mkdir .ssh

oracle@node1:~ > chmod 700 .ssh #這一步很重要，而且必須是700許可權，否則失敗

oracle@node1:~ > ssh-keygen –t rsa

oracle@node1:~ > ssh-keygen –t dsa

oracle@node1:~ > cd .ssh ; ls

id_dsa id_dsa.pub id_rsa id_rsa.pub

（2）在節點2上

oracle@node2:~ > pwd

/home/oracle

oracle@node2:~ > mkdir .ssh

oracle@node2:~ > chmod 700 .ssh #這一步很重要，而且必須是700許可權，否則失敗

oracle@node2:~ > ssh-keygen –t rsa

oracle@node2:~ > ssh-keygen –t dsa

oracle@node2:~ > cd .ssh ; ls

id_dsa id_dsa.pub id_rsa id_rsa.pub

（3）建立信任關係

oracle@node1:~/.ssh > cat id_rsa.pub >> authorized_keys

oracle@node1:~/.ssh > cat id_dsa.pub >> authorized_keys

oracle@node1:~/.ssh > ssh node2 cat /home/oracle/.ssh/id_rsa.pub >> authorized_keys

oracle@node1:~/.ssh > ssh node2 cat /home/oracle/.ssh/id_dsa.pub >> authorized_keys

oracle@node1:~/.ssh > scp authorized_keys node2:/home/oracle/.ssh/

（4）測試信任關係

oracle@node1:~ > ssh node2 date

oracle@node2:~ > ssh node1 date

均不用輸入密碼，則信任關係建立完畢！