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配置ssh免密碼登錄-密鑰公鑰( key)與私鑰( Key)登錄

Ref產品密鑰是什么樣子：

linux自動生成方式：

linux-g50f:/ # ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): key-gen-key
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in key-gen-key.
Your public key has been saved in key-gen-key.pub.
The key fingerprint is:
79:0f:14:d5:9c:83:5d:ea:c8:f4:93:49:87:79:eb:a1 root@linux-g50f
The key's randomart image is:
+--[ RSA 2048]----+
|          ...= o.|
|           .. *+ |
|          . . =.o|
|         o o = =.|
|        S o o *o |
|         . o  o..|
|            .E . |
|                 |
|                 |
+-----------------+

此時會在當前目錄下生成兩個文件產品密鑰是什么樣子：

-rw-------  1 root root 1743 Aug  3 17:10 key-gen-key
-rw-r--r--  1 root root  397 Aug  3 17:10 key-gen-key.pub

by Mike Sun @