Implement password-free login to Linux server with public key private key

• Principle
• The client generates the public key, copies the public key to the Linux server, and connects to the server with its own private key. The implementation is as follows:
• If you have two Linux servers A and b,a to implement password-free login b

1. A execute ssh-keygen-t RSA will generate Id_rsa (private key) and id_rsa_pub (public key) in/root/.ssh
2. Under B

   Mkdir/root/.ssh

   chmod 700/root/.ssh

3. Create a Vi/root/.ssh/authorized_keys under B
4. Add the public key content of a generated to the/root/.ssh/authorized_keys file in B, either by copying or pasting, or by copying the key in the same way

Implement password-free login to Linux server with public key private key