To set up passwordless login from a Mac OS laptop to an Ubuntu server using SSH keys, you can follow these steps:
Open Terminal on your Mac OS laptop.
Generate a new SSH key pair by running the following command:
ssh-keygen -t rsa
When prompted, accept the default file location and leave the passphrase blank (or enter a passphrase if desired).
Copy the public key to the Ubuntu server by running the following command:
ssh-copy-id <username>@<server_ip_or_hostname>
Replace <username> with the username on the Ubuntu server and <server_ip_or_hostname> with the IP address or hostname of the server.
Log in to the Ubuntu server using SSH to confirm that passwordless login is working:
ssh <username>@<server_ip_or_hostname>
If everything is set up correctly, you should be able to log in to the Ubuntu server without entering a password.
