2016-05-29 回答
首先在client上建立public key和private key,需要使用ssh-keygen命令
[root@localhost .ssh]# ssh-keygen –t rsa
generating public/private rsa key pair.
enter file in which to save the key (/root/.ssh/id_rsa):
enter passphrase (empty for no passphrase): 按enter
enter same passphrase again: 按enter
your identification has been saved in /root/.ssh/id_rsa.
your public key has been saved in /root/.ssh/id_rsa.pub.
the key fingerprint is:
e8:8a:5e:ae:c7:13:45:d0:81:cd:3f:e6:1e:f8:88:5a
root@localhost.localdomain
2. 然后将private key 放在client上的宿主目录，一般放在/root/.ssh/目录中
并修改权限为user可读
3 最后，将public key 放在任何一个您想登陆主机server中的某user的宿主目录
下的.ssh/子目录人证文档中即可。
4 现在192.168.0.6是client 想连接到192.168.0.8上用ssh-keygen –t rsa产生key
(-t参数是使用和种密码)这时在我的/root/.ssh/里边产生了三个文档分别是公钥
(id_rsa.pub)和私钥(id_rsa)另外要注意的就是id_rsa文档权限他必须是-rw——否则回不安全，id_rsa.pub就是公钥,把这个放到server目录上去用命令
[wds@localhost .ssh]# sftp id_rsa.pub
root@192.168.0.8
[wds@localhost .ssh]# passwd
[wds@localhost .ssh]# put id_rsa.pub
[root@localhost .ssh]# uploading id_rsa.pub to /root/.ssh/
[root@localhost .ssh]# exit
然后到服务器上去192.168.0.8
[root@localhost .ssh]# ssh –l root 192.168.0.8
[root@localhost .ssh]# cd /root/.ssh/
[root@localhost .ssh]#more id_rsa.pub >> authorized_keys 这样就能够了
[root@localhost .ssh]#
返回client上192.168.0.6
[root@localhost .ssh]# exit
[root@localhost .ssh]# ssh 192.168.0.8
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