Create SSH key locally and install in remote machine

On client, navigate to the ssh folder.
```
cd ~/.ssh
```
Generate a key pair, public and private. Make sure to specify a unique name to allow ids for connecting to multiple devices.
```
ssh-keygen
```
Add the key to the ssh agent, so it is used when attempting to connect.
```
ssh-add ~/.ssh/key-file-name
```
Copy to the target server.
```
ssh-copy-id username@remote-host
```
Verify by trying to connect to the remote host.
```
ssh user@remote-host -i ~/.ssh/key-file-name
```

Reference

# List keys known by ssh-agent
ssh-add -l