SSH Raspberry Pi with SSH key

Raspberry Pi Documentation

Generate Key at host that remote from

ssh-keygen -t rsa -C <name>@<hostname>

Copy public key to remote host

Create a .ssh folder at Raspberry Pi, if not exists

cat ~/.ssh/id_rsa.pub | ssh <USERNAME>@<IP-ADDRESS> 'cat >> .ssh/authorized_keys'

Connect

ssh <USERNAME>@<IP-ADDRESS>