SSH password free login, my server password free login to the other server, the other server password free login to your server

The following operations are performed on your server

1. Let the other server log in to you without secret

# Log in to the opposite server , Enter the password of the opposite server
ssh [email protected] The other server ip

# Use the opposite server to generate public and secret keys , Enter all by default
ssh-keygen

# Put the public key of the other server on your server , This step requires a password
ssh-copy-id [email protected] Your server ip

# Now the other server can log in without secret by using the following commands
ssh [email protected] Your server ip

2. Your server can log in to the other server without secret

# Use the opposite server to generate public and secret keys , Enter all by default
ssh-keygen

# Put your public key on the other server , This step requires a password
ssh-copy-id [email protected] The other server ip

# Now your server can log in to the other server without secret
ssh [email protected] The other server ip