请参考下面的URL,它有一步一步的可视化
https://www.tecmint.com/ssh-passwordless-login-using-ssh-keygen-in-5-easy-steps/
希望对您有所帮助!!!...
例子
设置环境
SSH 客户端:192.168.0.12 (Fedora 21)
SSH 远程主机:192.168.0.11 (CentOS 7)
第 1 步:在 – (192.168.0.12) 上创建身份验证 SSH-Kegen 密钥
[tecmint@tecmint.com ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/tecmint/.ssh/id_rsa): [Press enter key]
Created directory '/home/tecmint/.ssh'.
Enter passphrase (empty for no passphrase): [Press enter key]
Enter same passphrase again: [Press enter key]
Your identification has been saved in /home/tecmint/.ssh/id_rsa.
Your public key has been saved in /home/tecmint/.ssh/id_rsa.pub.
The key fingerprint is:
5f:ad:40:00:8a:d1:9b:99:b3:b0:f8:08:99:c3:ed:d3 tecmint@tecmint.com
The key's randomart image is:
+--[ RSA 2048]----+
| ..oooE.++|
| o. o.o |
| .. . |
| o . . o|
| S . . + |
| . . . o|
| . o o ..|
| + + |
| +. |
+-----------------+
第 2 步:在 – 192.168.0.11 上创建 .ssh 目录
[tecmint@tecmint ~]$ ssh sheena@192.168.0.11 mkdir -p .ssh
The authenticity of host '192.168.0.11 (192.168.0.11)' can't be established.
RSA key fingerprint is 45:0e:28:11:d6:81:62:16:04:3f:db:38:02:la:22:4e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.0.11' (ECDSA) to the list of known hosts.
sheena@192.168.0.11's password: [Enter Your Password Here]
第 3 步:将生成的公钥上传到 – 192.168.0.11
[tecmint@tecmint ~]$ cat .ssh/id_rsa.pub | ssh sheena@192.168.0.11 'cat >> .ssh/authorized_keys'
sheena@192.168.1.2's password: [Enter Your Password Here]
第 4 步:在 – 192.168.0.11 上设置权限
[tecmint@tecmint ~]$ ssh sheena@192.168.0.11 "chmod 700 .ssh; chmod 640 .ssh/authorized_keys"
sheena@192.168.0.11's password: [Enter Your Password Here]
第五步:无密码从192.168.0.12登录到192.168.0.11服务器
[tecmint@tecmint ~]$ ssh sheena@192.168.0.11