[Hadoop@n1 ~]$ mkdir .ssh
[hadoop@n1 ~]$ chmod 700 .ssh
[hadoop@n1 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
57:f2:fe:1b:e9:21:9f:fa:84:55:4c:13:37:d2:10:48 hadoop@n1
[hadoop@n1 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_dsa.
Your public key has been saved in /home/hadoop/.ssh/id_dsa.pub.
The key fingerprint is:
24:6e:83:17:f0:5d:72:8f:00:9e:8b:7c:ed:28:9d:88 hadoop@n1
[hadoop@n1 ~]$ touch .ssh/authorized_keys
在d1上执行
[hadoop@d1 ~]$ mkdir .ssh
[hadoop@d1 ~]$ chmod 700 .ssh
[hadoop@d1 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
83:bc:0d:3b:fc:b8:53:e6:aa:cc:46:ed:2b:8d:8f:17 hadoop@d1
[hadoop@d1 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_dsa.
Your public key has been saved in /home/hadoop/.ssh/id_dsa.pub.
The key fingerprint is:
86:7b:5e:66:99:22:7f:2c:38:07:08:73:91:70:3a:cb hadoop@d1
在d2上执行
[hadoop@d2 ~]$ mkdir .ssh
[hadoop@d2 ~]$ chmod 700 .ssh
[hadoop@d2 ~]$
[hadoop@d2 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
50:c1:c8:fa:8e:c0:0e:3e:eb:26:dc:23:ee:1d:27:fe hadoop@d2
[hadoop@d2 ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_dsa.
Your public key has been saved in /home/hadoop/.ssh/id_dsa.pub.
The key fingerprint is:
ae:f4:a2:96:2a:f2:24:33:c0:bc:63:08:2c:ef:af:51 hadoop@d2
然后在n1上继续下面的执行。
[hadoop@n1 ~]$ cd .ssh
[hadoop@n1 .ssh]$ ll
total 16
-rw-rw-r-- 1 hadoop hadoop 0 Oct 9 02:49 authorized_keys
-rw------- 1 hadoop hadoop 668 Oct 9 02:48 id_dsa
-rw-r--r-- 1 hadoop hadoop 599 Oct 9 02:48 id_dsa.pub
-rw------- 1 hadoop hadoop 1675 Oct 9 02:48 id_rsa
-rw-r--r-- 1 hadoop hadoop 391 Oct 9 02:48 id_rsa.pub
[hadoop@n1 .ssh]$ ssh n1 cat /home/hadoop/.ssh/id_rsa.pub >> authorized_keys
The authenticity of host 'n1 (192.168.10.101)' can't be established.
RSA key fingerprint is 48:ef:fc:67:3f:43:88:0e:fa:e6:a6:ec:75:b0:c4:7f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'n1,192.168.10.101' (RSA) to the list of known hosts.
hadoop@n1's password:
[hadoop@n1 .ssh]$ ssh n1 cat /home/hadoop/.ssh/id_dsa.pub >> authorized_keys
hadoop@n1's password:
[hadoop@n1 .ssh]$ ssh d1 cat /home/hadoop/.ssh/id_rsa.pub >> authorized_keys
The authenticity of host 'd1 (192.168.10.102)' can't be established.
RSA key fingerprint is 48:ef:fc:67:3f:43:88:0e:fa:e6:a6:ec:75:b0:c4:7f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'd1,192.168.10.102' (RSA) to the list of known hosts.
hadoop@d1's password:
[hadoop@n1 .ssh]$ ssh d1 cat /home/hadoop/.ssh/id_dsa.pub >> authorized_keys
hadoop@d1's password:
[hadoop@n1 .ssh]$ ssh d2 cat /home/hadoop/.ssh/id_rsa.pub >> authorized_keys
The authenticity of host 'd2 (192.168.10.103)' can't be established.
RSA key fingerprint is 48:ef:fc:67:3f:43:88:0e:fa:e6:a6:ec:75:b0:c4:7f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'd2,192.168.10.103' (RSA) to the list of known hosts.
hadoop@d2's password:
[hadoop@n1 .ssh]$ ssh d2 cat /home/hadoop/.ssh/id_dsa.pub >> authorized_keys
hadoop@d2's password:
[hadoop@n1 .ssh]$ ll
total 24
-rw-rw-r-- 1 hadoop hadoop 2970 Oct 9 02:56 authorized_keys
-rw------- 1 hadoop hadoop 668 Oct 9 02:48 id_dsa
-rw-r--r-- 1 hadoop hadoop 599 Oct 9 02:48 id_dsa.pub
-rw------- 1 hadoop hadoop 1675 Oct 9 02:48 id_rsa
-rw-r--r-- 1 hadoop hadoop 391 Oct 9 02:48 id_rsa.pub
-rw-r--r-- 1 hadoop hadoop 1197 Oct 9 02:56 known_hosts
然后，在3个节点上分别执行下面操作。
[hadoop@n1 ~]$ chmod 600 .ssh/authorized_keys
[hadoop@n1 ~]$ exec /ssh-agent $SHELL
-bash: /ssh-agent: No such file or directory
-bash: exec: /ssh-agent: cannot execute: No such file or directory
[hadoop@n1 ~]$ exec ssh-agent $SHELL
[hadoop@n1 ~]$ ssh-add
Identity added: /home/hadoop/.ssh/id_rsa (/home/hadoop/.ssh/id_rsa)
Identity added: /home/hadoop/.ssh/id_dsa (/home/hadoop/.ssh/id_dsa)
使用ssh『机器名』date命令，验证SSH互信的建立。