Linux下配置免密登录！

Posted 2020-10-20 无处安放的青春

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

第二步:用ssh-copy-id将公钥复制到远程机器中

1. [email protected]$ ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host
3. [email protected]‘s password:
5. Now try logging into the machine, with "ssh ‘remote-host‘", and check in:
9. .ssh/authorized_keys
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: 登录到远程机器不用输入密码

1. [email protected]$ ssh remote-host
3. Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2
5. [Note: SSH did not ask for password.]
9. [email protected]$ [Note: You are on remote-host here]

 

另外：

1. ssh-copy-id -u wyz -i ~/.ssh/id_rsa.pub [email protected]_host

上述是给wyz用户赋予无密码登陆的权利