Using Android Device as a Linux Server

It is possible to use Android device as a Linux server. With a few tools and apps, you can run web servers, SSH, and more — all from your Andoird. You can even make it publicly accessible over the internet.

Prerequist

• Android device
• Cloudflare account with domain
• Some Linux skill

First of all you need to install Termux which is a terminal emulator and Linux command-line environment. You can install Termux from here. We will run all commands inside Termux from here on.

Upgrade Termux Packages

pkg update
pkg upgradeCode language: Bash (bash)

Install Apache Web Server

For this example, we will setup an apache web server. Start by installing it:

pkg install apache2

Run Apache Web Server

apachectlCode language: Bash (bash)

To check if the server is running visit http://localhost:8080 from your Android device.

Now your Android device is running a web server. You can also run a Node.js app by installing Node.js.

Next, we’ll make the server publicly accessible using Cloudflare Tunnel.

Note: You must have a domain already added to your Cloudflare account to use Cloudflare Tunnel.

Install Cloudflare Tunnel Client

pkg install cloudflaredCode language: Bash (bash)

Login to Cloudflare

cloudflared tunnel login

It will open a browser for login. After logging in, select a hostname (domain) to grant access. It will create an account certificate file (cert.pem) in the default cloudflared directory (~/.cloudflared).

Create a Tunnel

cloudflared tunnel create my-tunnelCode language: Bash (bash)

my-tunnel is your tunnel name, which you will need later. It will also create a tunnel credentials file ({UUID}.json).

Create a Config

Create a config.yml file inside ~/.cloudflared directory with following content. Replace the {UUID} with the id generated while creating the tunnel. And <domain> with the hostname you gave access while login.

tunnel: {UUID}
credentials-file: /data/data/com.termux/files/home/.cloudflared/{UUID}.json
ingress:
  - hostname: tunnel.<domain>
    service: http://localhost:8080
  - service: http_status:404Code language: YAML (yaml)

http://localhost:8080 is the localhost server URL running in the Android device. cloudflared will respond with a 404 status code when the request does not match any of the previous hostnames.

Start Routing Traffic

cloudflared tunnel route dns my-tunnel tunnel.<domain>Code language: Bash (bash)

It will assign a CNAME record that points traffic to your tunnel subdomain.

Run the Tunnel

cloudflared tunnel run my-tunnelCode language: Bash (bash)

Now you can access https://tunnel.<domain> from any network.

The official documentation covers everything you may need to know about creating tunnels and configuring it. You can refer to it for more advanced setup and troubleshooting.