使用ssh-keygen和ssh-copy-id三步实现SSH无密码登录
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
- 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
fe
95:95:18
31
de
2f
35:f9 jsmith@local-host
第二步:用ssh-copy-id将公钥复制到远程机器中
- 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 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
- 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]
另外：
- ssh-copy-id -u wyz -i ~/.ssh/id_rsa.pub wyz@remote_host
上述是给wyz用户赋予无密码登陆的权利
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