使用ssh-keygen和ssh-copy-id三步实现SSH无密码登录

分手后的思念是犯贱 2022-07-21 05:49 161阅读 0赞

ssh-keygen  产生公钥与私钥对.

ssh-copy-id 将本机的公钥复制到远程机器的authorized\_keys文件中，ssh-copy-id也能让你有到远程机器的home, ~./ssh , 和 ~/.ssh/authorized\_keys的权利

第一步:在本地机器上使用ssh-keygen产生公钥私钥对

1.  jsmith@local-host$ \[Note: You are on local-host here\]
2.  
3.  
4.  
5.  jsmith@local-host$ ssh-keygen
6.  
7.  Generating public/private rsa key pair.
8.  
9.  Enter file in which to save the key (/home/jsmith/.ssh/id\_rsa):\[Enter key\]
10. 
11. Enter passphrase (empty for no passphrase): \[Press enter key\]
12. 
13. Enter same passphrase again: \[Pess enter key\]
14. 
15. Your identification has been saved in /home/jsmith/.ssh/id\_rsa.
16. 
17. Your public key has been saved in /home/jsmith/.ssh/id\_rsa.pub.
18. 
19. The key fingerprint is:
20. 
21. 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9 [jsmith@local-host][jsmith_local-host]

第二步:用ssh-copy-id将公钥复制到远程机器中

1.  jsmith@local-host$ ssh-copy-id -i ~/.ssh/id\_rsa.pub remote-host
2.  
3.  jsmith@remote-host's password:
4.  
5.  Now try logging into the machine, with "ssh 'remote-host'", and check in:
6.  
7.  
8.  
9.  .ssh/authorized\_keys
10. 
11. 
12. 
13. to make sure we haven't added extra keys that you weren't expecting.

注意: ssh-copy-id 将key写到远程机器的 ~/ .ssh/authorized\_key.文件中

第三步:  [登录到][Link 1]远程机器不用输入密码

1.  jsmith@local-host$ ssh remote-host
2.  
3.  Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2
4.  
5.  \[Note: SSH did not ask for password.\]
6.  
7.  
8.  
9.  jsmith@remote-host$ \[Note: You are on remote-host here\]

另外：

1.  ssh-copy-id -u wyz -i ~/.ssh/id\_rsa.pub [wyz@remote\_host][wyz_remote_host]

上述是给wyz用户赋予无密码登陆的权利

[jsmith_local-host]: mailto:jsmith@local-host
[Link 1]: mailto:jsmith@local-host$
[wyz_remote_host]: mailto:eucalyptus@remote_host