📘 Create OCI Instance (Oracle Cloud)

🎯 Goal

Deploy a cloud server (OCI instance) to run: - Website - Telegram Bot 24/7 without keeping local PC ON

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🧠 What is OCI?

OCI (Oracle Cloud Infrastructure) = Cloud platform by Oracle

Provides: - Virtual servers (instances) - Storage - Networking - Public internet access

Simple: Local PC ❌ → Limited, needs power
OCI Server ✅ → Always ON, accessible anywhere

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🖥️ What is an Instance?

Instance = Virtual Machine (VM)

It is: - Remote Linux computer - Ubuntu server - Has CPU, RAM, Storage

Connection flow: Your Laptop → SSH → OCI Instance → Run Project

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🆓 Always Free Tier (IMPORTANT)

OCI gives lifetime free resources:

Includes: - 2 ARM instances (Ampere) - Up to 24 GB RAM (shared) - Public IP - Block storage

Rules: - Use VM.Standard.A1.Flex ONLY - Stay within limits - Avoid long idle usage

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🚀 Step-by-Step: Create OCI Instance

1. Login

https://cloud.oracle.com

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2. Navigate

Menu → Compute → Instances → Create Instance

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3. Basic Config

Name: tutorial-server
Image: Ubuntu 22.04
Shape: VM.Standard.A1.Flex (IMPORTANT)

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4. Shape Config

CPU: 1 core
RAM: 6 GB

Enough for: - Website - Telegram bot - Other things

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5. SSH Key

Select: Generate SSH Key Pair

Download private key (.key)

IMPORTANT: - Do NOT lose it - Required for login

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6. Networking

Enable: Assign Public IPv4 ✅

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7. Create

Click: Create
Wait 1–2 minutes

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🔐 Connect to Server

Copy Public IP

Example: 123.45.67.89

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SSH Login

Linux / Mac: ssh -i yourkey.key ubuntu@your_ip

Windows (PowerShell): ssh -i yourkey.key ubuntu@your_ip

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✅ First Output

Welcome to Ubuntu 22.04

Server ready

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⚠️ Common Errors & Solutions

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❌ Permission denied (publickey)

Error: Permission denied (publickey)

Reason: Wrong SSH key or key permission issue

Solution: chmod 400 yourkey.key
ssh -i yourkey.key ubuntu@your_ip

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❌ Connection timed out

Reason: Port 22 blocked in OCI

Solution: Go to: Networking → VCN → Subnet → Security List
Add Ingress Rule: - Port: 22
- Source: 0.0.0.0/0

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❌ Instance created but no public IP

Reason: Public IP not assigned

Solution: Edit instance → Attach Public IP

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❌ Wrong username

Error: Permission denied

Reason: Using wrong user

Solution: Use: ubuntu (for Ubuntu image)

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❌ SSH works but website not opening

Reason: Port 80/443 blocked

Solution: Open ports: - 80 (HTTP) - 443 (HTTPS)

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❌ Instance stopped automatically

Reason: Idle or resource misuse

Solution: - Stay within free tier - Restart instance from OCI panel

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🔥 Important Notes

• Always use A1 Flex (free tier)
• Keep SSH key safe
• Open ports later (80, 443)
• This is your production server

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🧩 Project Flow

Local Development → GitHub → OCI Server
↓
Website + Bot 24/7

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📌 Next Step

• Install Python
• Install Git
• Clone project

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✅ Status

OCI Instance Created ✔️
Ready for Deployment ✔️