If you want to disable ssh password login on your remote server for extra security.
here how you can do this –
First you have to generate ssh keys on your Linux machine.
Open your terminal and type
ssh-keygen -t rsa
Then it ask for passphrase its optional.
Once the key is generated push this key into the Server.
cat .ssh/id_rsa.pub | ssh root@remotemachine ‘cat >> .ssh/authorized_keys’
Now you can login without pw prompt
Now After login Disable the password login from remote server
Login to your remote server and open the SSH configuration file for editing by entering the following command:
sudo systemctl restart sshd