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1 修改三台虚拟机的/ect/hosts文件 [ ~]$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[ ~]$ su - root
密码：
上一次登录：六 11月 4 15:52:36 CST 2017pts/0 上
ABRT has detected 1 problem(s). For more info run: abrt-cli list --since 1509781956
[ ~]# vi /etc/hosts
[ ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.169.101 hadoop01
192.168.169.102 hadoop02
192.168.169.103 hadoop03 2 修改三台虚拟机的/etc/ssh/sshd_config [ ~]# vi /etc/ssh/sshd_config
[ ~]# cat /etc/ssh/sshd_config grep uth grep -v #
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys 将前面的#号去掉 3 修改三台虚拟机的/etc/selinux/config [ ~]# vi /etc/selinux/config
[ ~]# cat /etc/selinux/config grep SELINUX= grep -v #
SELINUX=disabled 4 重启虚机三台虚拟机 [ ~]# reboot 5 配置SSH无密码登录 三台虚拟机依次操作如下： 192.168.168.101 [ ~]$ ssh-keygen
Generating public/private dsa key pair.
Created directory /hadoop/.ssh.
Your identification has been saved in /hadoop/.ssh/id_dsa.
Your public key has been saved in /hadoop/.ssh/id_dsa.pub.
The key fingerprint is:
c1:4b:6d:30:2b:57:b9:f8:dc:33:b6:d9:05:f8:79:31
The keys randomart image is:
+--[ DSA 1024]----+
o ..
. *.
. *.o. .
+.+. . .E
So . . oo
o = o o
. * o
o .
+-----------------+
[ ~]$ chmod 700 .ssh
[ ~]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
[ ~]$ chmod 600 ~/.ssh/authorized_keys
[ ~]$ ssh hadoop01
The authenticity of host hadoop01 (192.168.169.101) cant be established.
ECDSA key fingerprint is 7a:41:d1:c6:30:98:21:51:40:b7:ac:13:a4:0d:05:5c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop01,192.168.169.101 (ECDSA) to the list of known hosts.
Last login: Sun Nov 5 10:24:11 2017 from 192.168.169.1
[ ~]$ exit
登出
Connection to hadoop01 closed.
[ ~]$ ssh hadoop01
Last login: Sun Nov 5 10:26:02 2017 from hadoop01 192.168.168.102 [ ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/hadoop/.ssh/id_rsa):
Created directory /hadoop/.ssh.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /hadoop/.ssh/id_rsa.
Your public key has been saved in /hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
ee:ba:9f:68:d8:ab:27:ea:f7:42:ff:0c:47:80:fe:63
The keys randomart image is:
+--[ RSA 2048]----+
.
. .
. .
. S
.. o
. +E o
=.=B .
.oo.B***
+-----------------+
[ ~]$ chmod 700 .ssh
[ ~]$ scp -rp ~/.ssh/id_rsa.pub:/hadoop/.ssh/id_rsa.pub.102
The authenticity of host hadoop01 (192.168.169.101) cant be established.
ECDSA key fingerprint is 7a:41:d1:c6:30:98:21:51:40:b7:ac:13:a4:0d:05:5c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop01,192.168.169.101 (ECDSA) to the list of known hosts.
spassword:
id_rsa.pub 192.168.169.103 [;~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/hadoop/.ssh/id_rsa):
Created directory /hadoop/.ssh.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /hadoop/.ssh/id_rsa.
Your public key has been saved in /hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
The keys randomart image is:
+--[ RSA 2048]----+
.+O
+.*
. o.+
o *.+
E .S +
o.=
o.
..
..
+-----------------+
[ ~]$ chmod 700 .ssh
[ ~]$ scp -rp ~/.ssh/id_rsa.pub:/hadoop/.ssh/id_rsa.pub.103
The authenticity of host hadoop01 (192.168.169.101) cant be established.
ECDSA key fingerprint is 7a:41:d1:c6:30:98:21:51:40:b7:ac:13:a4:0d:05:5c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop01,192.168.169.101 (ECDSA) to the list of known hosts.
spassword:
id_rsa.pub 192.168.169.101 [ ~]$ cat ~/.ssh/id_rsa.pub.102 >> ~/.ssh/authorized_keys
[ ~]$ cat ~/.ssh/id_rsa.pub.103 >> ~/.ssh/authorized_keys
[ ~]$ scp -rp ~/.ssh/authorized_keys:/hadoop/.ssh/
The authenticity of host hadoop02 (192.168.169.102) cant be established.
ECDSA key fingerprint is f7:ef:fb:e5:7e:0f:59:40:63:23:99:9a:ca:e2:03:e8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop02,192.168.169.102 (ECDSA) to the list of known hosts.
spassword:
authorized_keys 100% 397 0.4KB/s 00:00
[ ~]$ scp -rp ~/.ssh/authorized_keys:/hadoop/.ssh/
The authenticity of host hadoop03 (192.168.169.103) cant be established.
ECDSA key fingerprint is 25:a7:16:1f:49:91:0f:ba:f8:ba:68:bb:1e:e0:1c:44.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop03,192.168.169.103 (ECDSA) to the list of known hosts.
spassword:
authorized_keys 100% 397 0.4KB/s 00:00 6 验证 192.168.169.101 [ ~]$ ssh hadoop02
Last login: Sun Nov 5 13:42:56 2017 from 192.168.169.1
[ ~]$ exit
登出
Connection to hadoop02 closed.
[ ~]$ ssh hadoop03
Last login: Sun Nov 5 13:42:58 2017 from 192.168.169.1
[ ~]$ 192.168.169.102 [ ~]$ ssh hadoop01
Last login: Sun Nov 5 13:44:08 2017 from 192.168.169.1
[ ~]$ exit
登出
Connection to hadoop01 closed.
[ ~]$ ssh hadoop03
The authenticity of host hadoop03 (192.168.169.103) cant be established.
ECDSA key fingerprint is 25:a7:16:1f:49:91:0f:ba:f8:ba:68:bb:1e:e0:1c:44.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop03,192.168.169.103 (ECDSA) to the list of known hosts.
Last login: Sun Nov 5 13:51:57 2017 from hadoop01
[ ~]$ 192.168.169.103 [ ~]$ ssh hadoop01
Last login: Sun Nov 5 13:52:30 2017 from hadoop02
[ ~]$ exit
登出
Connection to hadoop01 closed.
[ ~]$ ssh hadoop02
The authenticity of host hadoop02 (192.168.169.102) cant be established.
ECDSA key fingerprint is f7:ef:fb:e5:7e:0f:59:40:63:23:99:9a:ca:e2:03:e8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added hadoop02,192.168.169.102 (ECDSA) to the list of known hosts.
Last login: Sun Nov 5 13:51:50 2017 from hadoop01
[ ~]$
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