1.6 SSH免密登入
第1章 環境安裝配置
1.6 SSH免密登入
1、XShell的一個技巧
當多臺虛擬機器需要執行相同命令時，可以單擊XShell右下角的“三條橫槓”按鈕，選擇“全部會話”，這時XShell下方的輸入框將顯示提示“傳送文字到當前XShell視窗的全部會話”
比如在XShell下方輸入框輸入data命令
回車後，將該date命令同時傳送到node1、node2和node3。這時可以看到其他兩個會話標籤多了個歎號提示符。
檢視node2執行情況
查詢node3執行情況
2、生成RSA祕鑰對
在XShell下方輸入框中輸入命令ssh-keygen -t rsa，然後回車執行。再回車3次，即可生成RSA祕鑰對
檢視金鑰對檔案
-
[root
@node1 ~]
# ls .ssh
-
id_rsa id_rsa.pub
- 1
- 2
- id_rsa：私鑰
- id_rsa.pub：公鑰-
3、將每個節點的公鑰拷貝到authorized_keys
可以通過命令ssh-copy-id，將本機公鑰複製到其他節點的authorized_keys目錄，這樣本機即可免祕鑰登入其他節點。
為了操作方便，我們通過XShell執行下方輸入框執行命令即可：
ssh-copy-id node1
- 1
按照提示輸入“yes”和密碼，即可將node1的公鑰複製到node1、node2和node3節點。（複製本機，可以實現免密登入本機）
然後再通過XShell分別執行：
-
ssh-
copy-
id node2
-
ssh-
copy-
id node3
- 1
- 2
通過XShell執行三條ssh-copy-id命令，實際上就是分別在node1、node2和node3節點執行。下面是命令執行資訊：
（1）node1
ssh-copy-id node1
ssh-copy-id node2
ssh-copy-id node3
-
[[email protected] ~]
# ssh-copy-id node1
-
The authenticity
of host
'node1 (192.168.80.131)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node1'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
# ssh-copy-id node2
-
The authenticity
of host
'node2 (192.168.80.132)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node2'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
# ssh-copy-id node3
-
The authenticity
of host
'node3 (192.168.80.133)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node3'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
#
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（2）node2
ssh-copy-id node1
ssh-copy-id node2
ssh-copy-id node3
-
[[email protected] ~]
# ssh-copy-id node1
-
The authenticity
of host
'node1 (192.168.80.131)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node1'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
# ssh-copy-id node2
-
The authenticity
of host
'node2 (192.168.80.132)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node2'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
# ssh-copy-id node3
-
The authenticity
of host
'node3 (192.168.80.133)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node3'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
#
- 1
- 2
- 3
- 4
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- 38
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- 40
（3）node3
ssh-copy-id node1
ssh-copy-id node2
ssh-copy-id node3
-
[[email protected] ~]
# ssh-copy-id node1
-
The authenticity
of host
'node1 (192.168.80.131)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
/usr/bin/ssh-copy-id: INFO:
1
key(s) remain
to be installed --
if you are prompted now it
is
to install the
new keys
-
[email protected]
's password:
-
-
Number
of
key(s) added:
1
-
-
Now
try logging
into the machine,
with:
"ssh 'node1'"
-
and check
to make sure that only the
key(s) you wanted were added.
-
-
[[email protected] ~]
# ssh-copy-id node2
-
The authenticity
of host
'node2 (192.168.80.132)' can't be established.
-
ECDSA
key fingerprint
is e2:
9a:
7d:
70:
25:
24:
45:
11:
97:
12:
35:e0:
45:
4c:
64:
31.
-
Are you sure you want
to
continue connecting (yes/no)? yes
-
/usr/bin/ssh-copy-id: INFO: attempting
to log
in
with the
new
key(s),
to filter out any that are already installed
-
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十四、SSH免密登入
SSH免密登入
1、客戶端生成公鑰、私鑰
[email protecte
入門學習Hadoop1：VMware上搭建hadoop伺服器Centos7叢集，並設定SSH免密登入。
修改主機名：hostnamectl set-hostname master
檢視自己虛擬機器閘道器IP為多少
修改ip：vim /etc/sysconfig/network-scripts/ifcfg-ens32
master:192.168.187.100