例子：在192.168.0.12使用tecmint用户，连接192.168.0.11主机上的sheena用户
Step 1: Create Authentication SSH-Kegen Keys on – (192.168.0.12)
First login into server 192.168.0.12 with user tecmint and generate a pair of public keys using following command.
[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 ..|
| + + |
| +. |
+-----------------+
Step 2: Create .ssh Directory on – 192.168.0.11
Use SSH from server 192.168.0.12 to connect server 192.168.0.11 using sheena as user and create .sshdirectory under it, using following command.
[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]
Step 3: Upload Generated Public Keys to – 192.168.0.11
Use SSH from server 192.168.0.12 and upload new generated public key (id_rsa.pub) on server 192.168.0.11under sheena‘s .ssh directory as a file name authorized_keys.
[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]
Step 4: Set Permissions on – 192.168.0.11
Due to different SSH versions on servers, we need to set permissions on .ssh directory and authorized_keys file.
[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]
Step 5: Login from 192.168.0.12 to 192.168.0.11 Server without Password
From now onwards you can log into 192.168.0.11 as sheena user from server 192.168.0.12 as tecmint user without password.
[tecmint@tecmint ~]$ ssh sheena@192.168.0.11