Installing OpenSSH Server and Enabling sshd

A default Oracle Linux installation includes the openssh and openssh-server packages, but the sshd service isn't enabled by default.

If the packages aren't installed, run the following command:
```
sudo dnf install openssh openssh-server
```
Start the sshd service and configure it to start following a system reboot:
```
sudo systemctl start sshd
sudo systemctl enable sshd
```

You can set sshd configuration options for features such as Kerberos authentication, X11 forwarding, and port forwarding in the /etc/ssh/sshd_config file. For more information, see the sshd(8) and sshd_config(5) manual pages.