Set password-free logon for ssh and password-free logon for ssh

Set password-free logon for ssh and password-free logon for ssh

Hypothesis:

-> Host A of the operating machine must log on to machine B and machine C without A password as user1?

User user1 is created on machine B and machine C and can be logged on through ssh.

Machine A settings:

1. Install the ssh service. Here

2. # ssh-keygen-t rsa-p''

Auto generate ~ /. Ssh/id_rsa and ~ /. Ssh/id_rsa.pub files.

Machine B and machine C settings:

1. Install the ssh service. Here

2. Modify/etc/ssh/sshd_config to find the ssh configuration file, and enable PubkeyAuthentication yes.

3. append the id_rsa.pub file generated on server A to the user1/. ssh/authorized_keys file on server B and server C. If the file is not manually created, you can use it.

The preceding settings for machine B and machine C can also be performed on machine A as follows:

Ssh-copy-id-I ~ /. Ssh/id_rsa.pub user1 @ ip address of server B

Restart the sshd service.

A password-free logon to machine B:

Ssh user1 @ B press Enter.

C is the same as above.

Related unsuccessful logs:/var/log/secure of machine B or machine C

Ssh password-free settings

Set the. ssh directory to 700 and have the execution permission.
Set authorized_keys to 600. Otherwise, an error occurs.
For example
Ssh root @ localhost

Ssh does not require a logon password. How can I configure it?

Here is an example:
192.168.1.1 --- client
192.168.1.2 --- slave

First on 192.168.1.1
Ssh-keygen
Generate id_rsa id_rsa.pub
Copy the content in id_rsa.pub
Create the authorized_keys file in the/root/. ssh/directory of 192.168.1.2
Copy the content in id_rsa.pub of 192.168.1.1 to the authorized_keys file.

Then execute ssh-keygen on 1.2.
Copy the content in id_rsa.pub to/root/. ssh/authorized_keys at 192.168.1.1.

Now you can try it!