You can log in securely to your Oracle Compute Cloud Service instances from a remote host by using a secure shell (SSH) connection.
SSH is a cryptographic network protocol that uses two keys, a public key and a private key, to provide secure communication between two computers. SSH uses port 22 by default.
Before creating instances, generate at least one SSH key pair and ensure that the private key is available on each host that you will use to access the instances. You can use any SSH utility to generate SSH keys and log in to your instances. For example, if you’re logging in from a Windows host, then you can use PuTTY. If you are using a Linux host, then you can use OpenSSH.
You can associate a single SSH public key with multiple instances. You can select the SSH key file while creating an orchestration with a custom configuration.