step-by-step process to create an instance in the HUB-VCN-PUBLIC-Subnet in OCI and establish its connectivity:

1. Prepare Network Components

• Ensure the following are already set up (based on your previous config):
  • HUB VCN with a public subnet.
  • Internet Gateway attached to that VCN.
  • Custom Route Table with a 0.0.0.0/0 rule pointing to the Internet Gateway.
  • Appropriate Security List or NSG allowing required inbound (e.g., SSH on port 22, HTTP/HTTPS on ports 80/443) and outbound rules.

2. Launch the Compute Instance

1. Log in to OCI Console.
2. In the navigation menu, go to Compute > Instances.
3. Click Create Instance.

3. Configure Basic Instance Options

• Name: Enter a friendly name.
• Compartment: Choose the compartment where HUB VCN resides.
• Availability Domain: Select as required (usually “AD1” is fine).

4. Select Image and Shape

• Image: Choose an OS image (e.g., Oracle Linux, Ubuntu, Windows).
• Shape: Select a compute shape (VM.Standard type is common for testing).

5. Configure Networking

• Virtual Cloud Network (VCN): Select the HUB VCN.
• Subnet: Select the public subnet (HUB-VCN-PUBLIC-Subnet).
• Assign public IP address: Set to Yes (essential for direct Internet access).

6. Add SSH Keys

• Paste your public SSH key or generate one in OCI.
• Save the private key securely on your desktop—you’ll use it to connect.

7. Finish and Launch

• Review the settings.
• Click Create.
• The instance will move from “Provisioning” to “Running” state.

8. Establish Connectivity (Test SSH)

1. Get the instance’s public IP address from the instance details page.
2. From your terminal, connect using:

   ssh -i /path/to/private_key opc@
   

   • Replace /path/to/private_key with your private key file location.
   • Replace `` with the public IP address of the instance.

• If you can connect, Internet access is working.

9. (Optional) Validate Outbound Access

• SSH into the instance and run:

  curl https://www.oracle.com
  

  • Success indicates outbound Internet is configured.

Summary Table

Step	Console Section / UI	Setting / Action
Prepare Network	Networking / VCN	IGW, Route Table, Security List/NSG
Create Instance	Compute > Instances	Name, Compartment, AD
Image & Shape	Image/Shape step	Pick OS, shape
Configure Networking	Instance creation, Networking block	HUB VCN, Public Subnet, Assign public IP = Yes
Add SSH Key	SSH Key section	Paste or generate, save private key
Launch	Review + Create	-
Establish Connectivity	Use SSH terminal	Connect as opc@