用 ssh-key-gen 在本地主机上创建公钥和密钥
root@local-host$ 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: xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx
root@local-host
用 ssh-copy-id 把公钥复制到远程主机上(.ssh/authorized_key文件)
root@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@{目标IP}
root@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.
直接登录远程主机
root@local-host$ ssh root@{目标IP}
