ssh-keygen? 產生公鑰與私鑰對. ssh-copy-id?將本機的公鑰復制到遠程機器的authorized_keys文件中，ssh-copy-id也能讓你有到遠程機器的home, ~./ssh , 和 ~/.ssh/authorized_keys的權利
第一步:在本地機器上使用ssh-keygen產生公鑰私鑰對

jsmith@local-host$ [Note: You are on local-host here]

jsmith@local-host$ ssh-keygen

Generating public/private rsa key pair.

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?jsmith@local-host

第二步:用ssh-copy-id將公鑰復制到遠程機器中

jsmith@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host

jsmith@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.

注意:?ssh-copy-id?將key寫到遠程機器的 ~/?.ssh/authorized_key.文件中

第三步:?登錄到遠程機器不用輸入密碼

jsmith@local-host$ ssh remote-host

Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2

[Note: SSH did not ask for password.]

jsmith@remote-host$ [Note: You are on remote-host here]

?

常見問題：

ssh-copy-id -u eucalyptus -i ~eucalyptus/.ssh/id_rsa.pub?eucalyptus@remote_host

上述是給eucalyptus用戶賦予無密碼登陸的權利

[1]

/usr/bin/ssh-copy-id: ERROR: No identities found

使用選項?-i?，當沒有值傳遞的時候或者?如果?~/.ssh/identity.pub?文件不可訪問（不存在）,?ssh-copy-id?將顯示上述的錯誤信息??（ -i選項會優先使用將ssh-add -L的內容）

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