Private Server — C9

[Install] WantedBy=multi-user.target

| Component | Technology | Role | | ----------------- | ------------------------ | -------------------------------------------------------------------- | | | HTML5, JavaScript, Ace | Browser-based editor UI, file tree, terminal emulator. | | WebSocket server | Node.js (Express + Socket.IO) | Handles real‑time collaboration, file watching, terminal I/O. | | Backend bridge | c9/inspector (Node.js) | Spawns child processes (shell, linters, debuggers). | | Project runtime | Docker (optional) | Isolated workspace per user (recommended for security). | private server c9

[Unit] Description=Cloud9 IDE After=network.target [Service] Type=simple User=c9user Group=c9user WorkingDirectory=/opt/cloud9 ExecStart=/usr/bin/node server.js -p 8181 -l 0.0.0.0 -w /home/c9user/workspace -a username:hashed_password Restart=on-failure RestartSec=10 [Install] WantedBy=multi-user

Deploy legacy c9 only behind a hardened reverse proxy, with per‑user Docker workspaces, and monitor resource usage. Keep a migration plan ready. | | Project runtime | Docker (optional) |

1. Introduction: Why a Private Cloud9? Cloud9, originally created by Cloud9 IDE, Inc., was one of the first fully-featured browser-based IDEs (Integrated Development Environments). After its acquisition by Amazon in 2016, the open-source core ( c9/core ) was left to stagnate, while AWS released a managed version (AWS Cloud9). However, the legacy open-source version remains a powerful, lightweight, and highly customizable solution for self-hosted development environments.

However, in 2026, it should be treated as a , not a general‑purpose IDE server. For new projects, invest in Theia or code‑server – but if you need a battle‑tested, no‑frills web IDE that runs on a Raspberry Pi, the old c9 still delivers.

with Node 16 and c9 pre-installed: