Update README.md

README.md

@@ -1,34 +1,102 @@
-# Colab SSH Setup
-
-This repository provides a script and example to set up an SSH connection to Google Colab, allowing you to use Colab's resources locally in VS Code for resource-intensive tasks like machine learning.
-
-## Setup Instructions
-
-1. Clone the repository:
-
-   ```bash
-   git clone https://github.com/yourusername/colab-ssh-setup.git
-   cd colab-ssh-setup
-Open scripts/colab_ssh_setup.sh and replace 'YOUR_NGROK_TOKEN' and 'YOUR_CHOSEN_PASSWORD' with your Ngrok token and desired SSH password.
-
-Run the script in a Google Colab notebook:
-```
-!bash ./scripts/colab_ssh_setup.sh
-```
-Follow the instructions in the Colab output to establish an SSH connection.
-
-Running the Flask App
-Navigate to the examples/flask_app directory:
-```
-cd examples/flask_app
-```
-Install the required packages:
-```
-pip install -r ../../requirements.txt
-```
-Run the Flask app:
-```
-python app.py
-```
-Access the app by opening a browser and going to http://localhost:5000.
+# Cloudflared SSH Tunnel Setup
 
+This guide explains how to set up SSH access through Cloudflare Argo Tunnel using the Cloudflared binary. This setup provides a secure way to access your server, including instructions for running it on Google Colab.
+
+## Prerequisites
+
+- A client machine running a Unix-like operating system (Linux, macOS, etc.).
+- Cloudflared binary installed on your machine.
+- SSH client installed.
+
+## Installation and Setup
+
+### Step 1: Download and Install Cloudflared
+
+1. Download the latest Cloudflared `.deb` package from [Cloudflare Downloads](https://developers.cloudflare.com/argo-tunnel/downloads/).
+
+2. Open a terminal and navigate to the directory where the `.deb` file is located:
+   ```sh
+   cd ~/Downloads
+   ```
+
+3. Install the package using `dpkg`:
+   ```sh
+   sudo dpkg -i cloudflared-linux-amd64.deb
+   ```
+
+### Step 2: Locate the Cloudflared Binary
+
+1. Use the `which` command to find the absolute path of the installed Cloudflared binary:
+   ```sh
+   which cloudflared
+   ```
+   The output should be something like `/usr/local/bin/cloudflared`.
+
+### Step 3: Configure SSH
+
+1. Open your SSH config file with a text editor. If the file does not exist, create it:
+   ```sh
+   nano ~/.ssh/config
+   ```
+
+2. Append the following configuration to the SSH config file, replacing `<PUT_THE_ABSOLUTE_CLOUDFLARE_PATH_HERE>` with the path you obtained from the `which` command:
+   ```sh
+   Host *.trycloudflare.com
+       HostName %h
+       User root
+       Port 22
+       ProxyCommand <PUT_THE_ABSOLUTE_CLOUDFLARE_PATH_HERE> access ssh --hostname %h
+   ```
+   For example, if the path to the Cloudflared binary is `/usr/local/bin/cloudflared`, the configuration should be:
+   ```sh
+   Host *.trycloudflare.com
+       HostName %h
+       User root
+       Port 22
+       ProxyCommand /usr/local/bin/cloudflared access ssh --hostname %h
+   ```
+
+3. Save the changes and close the editor. In nano, press `Ctrl+X`, then `Y`, and finally `Enter`.
+
+### Step 4: Test the SSH Connection
+
+1. You can now test the SSH connection to your server via Cloudflare Tunnel:
+   ```sh
+   ssh your-server-name.trycloudflare.com
+   ```
+
+## Running on Google Colab
+
+To set up SSH access on Google Colab using Cloudflared, follow these steps:
+
+1. Open a new Colab notebook.
+
+2. Run the following code in a Colab cell:
+   ```python
+   # Install colab_ssh on google colab
+   !pip install colab_ssh --upgrade
+
+   from colab_ssh import launch_ssh_cloudflared, init_git_cloudflared
+   launch_ssh_cloudflared(password="root")
+   ```
+
+3. This code will install the `colab_ssh` package, set up an SSH tunnel using Cloudflared, and display the SSH command to connect to the Colab instance.
+
+4. Use the displayed SSH command to connect to your Colab instance from your terminal:
+   ```sh
+   ssh root@<displayed-ssh-address>
+   ```
+
+## Troubleshooting
+
+- Ensure that Cloudflared is properly installed and the path in the SSH config file is correct.
+- Verify that your server is properly configured to use Cloudflare Argo Tunnel for SSH access.
+
+## Additional Resources
+
+- [Cloudflare Argo Tunnel Documentation](https://developers.cloudflare.com/argo-tunnel/)
+- [SSH Configuration Guide](https://linux.die.net/man/5/ssh_config)
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.