Key-based security verification procedures for logging SSH service authentication types

By Ssh-keygen creating the key on the client, you can see that the LS ~/.ssh/id_rsa is the user's private key, and Id_rsa.pub is the public key. SSH-KEYGEN-T encryption type of the specified key pair default RSA encryption
Copy the public key id_rsa.pub file to the user home directory of the other server under the. SSH Directory
Append the contents of the copied id_rsa.pub file to the ~/.ssh/authorized_keys file on another server
Then you can ssh in.

Key-based security verification procedures for logging SSH service authentication types