OCI: How to Enable Password Based Authentication on Ubuntu 22.04 Instance

Applies To:

Oracle Cloud Infrastructure - Version Ubuntu 22.04 and later

Goal:

Enable password authentication on OCI Compute Ubuntu Instance.

Solution:

• Login to OCI Compute Linux (Ubuntu) instance

<ssh_clnt>$ ssh -i <PRIVATE_KEY> ubuntu@<UBUNTU_INSTANCE_IP_ADDRESS>

• Create a user for password authentication on that Ubuntu instance.

<ssh_serv>$ sudo useradd <USER_NAME>


Example)
<ssh_serv>$ sudo useradd testuser

• Setup a password for the new user.

<ssh_serv>$ sudo passwd <USER_NAME>


Example)

<ssh_serv>$ sudo passwd testuser

• Backup and edit /etc/ssh/sshd_config to enable PasswordAuthentication.

<ssh_serv>$ sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.backup