ssh-copy-id（雙機互信）

最簡單的2步驟：

ssh-keygen -t rsa 須要輸入的地方就回車

ssh-copy-id root@192.168.0.10

 

詳細：
ssh-keygen 建立公鑰和密鑰。
ssh-copy-id 把本地主機的公鑰複製到遠程主機的authorized_keys文件上。
ssh-copy-id 也會給遠程主機的用戶主目錄（home）和~/.ssh, 和~/.ssh/authorized_keys設置合適的權限 。

步驟1: 用 ssh-key-gen 在本地主機上建立公鑰和密鑰
#ssh-keygen -t rsa
Enter file in which to save the key (/home/jsmith/.ssh/id_rsa):[Enter key]
Enter passphrase (empty for no passphrase): [Press Enter key]
Enter same passphrase again: [Pess Enter key]
Your identification has been saved in /home/jsmith/.ssh/id_rsa.
Your public key has been saved in /home/jsmith/.ssh/id_rsa.pub.
The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9
ligh@local-host

步驟2: 用 ssh-copy-id 把公鑰複製到遠程主機上
#ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.0.10
ligh@remote-host‘s password:
Now try logging into the machine, with ―ssh ?remote-host‘‖, and check in:
.ssh/authorized_keys to make sure we haven‘t added extra keys that you weren‘t expecting.
[注: ssh-copy-id 把密鑰追加到遠程主機的 .ssh/authorized_key 上.]