Configure SSH to remember your credentials

Further reading here.

Create an SSH key pair

If you need to create a new SSH key pair, use the ssh-keygen command to create an Ed25519 key (more secure than RSA).

ssh-keygen -t ed25519

Follow the prompts, and give it a custom filename to not override existing key pairs if you have them.

On the local machine, transmit key to remote machine.

ssh-copy-id -i /Users/<username>/.ssh/<ssh_key_name (do not append .pub extension)>

Follow the prompt to enter password on remote machine (for hopefully the last time).

Store your connection settings

On the local machine, add a new entry to your SSH config to use the corresponding SSH key. Open your ssh config with your favorite text editor

vim ~/.ssh/config

Append the following template (replace everything in <brackets> with your actual values).

Host <host-nickname>
  HostName <hostname>
  User <username>
  IdentityFile ~/.ssh/<ssh_key_name (do not append .pub extension)>

From the local machine, try connecting to the remote.

ssh <host-nickname>