SSH 無密碼登陸遠程LINUX主機(ssky

ssh-keygen 創建公鑰和密鑰。

ssh-copy-id 把本地主機的公鑰復制到遠程主機的authorized_keys文件上。

1: 用 ssh-key-gen 在本地主機上創建公鑰和密鑰

ubuntu01@ubuntu:~/.ssh$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ubuntu01/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/ubuntu01/.ssh/id_rsa.
Your public key has been saved in /home/ubuntu01/.ssh/id_rsa.pub.
The key fingerprint is:
44:da:91:77:94:6f:11:c5:50:ac:6f:ad:b8:67:24:97 ubuntu01@ubuntu
The key's randomart image is:
+--[ RSA 2048]----+
| o. ...oBo|
| +... o . o|
| . o. . . o |
| . + |
| S . o.|
| . E +|
| = o |
| . + |
| .+ |
+-----------------+

ubuntu01@ubuntu:~$ sudo ssh-copy-id -i .ssh/id_rsa.pub [email protected]
The authenticity of host '192.168.159.130 (192.168.159.130)' can't be established.
ECDSA key fingerprint is 53:9f:38:12:85:1e:ce:7c:f7:3d:ab:14:78:72:e0:cb.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.159.130' (ECDSA) to the list of known hosts.
[email protected]'s password:
Now try logging into the machine, with "ssh '[email protected]'", and check in:
  ~/.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.

ubuntu01@ubuntu:~/.ssh$ ssh localhost