Crontab UI Cron Job Web Manager

This is a repackaged open source software product wherein additional charges apply for cloudimg support services.

## Why This AMI Instead of Self-Deploying?

Crontab UI is a popular open source web interface for managing cron jobs. Instead of hand editing crontab text over SSH, you create, edit, pause, resume, run, import, export, back up and restore scheduled jobs from a browser, with a clear view of every job's schedule and command, and backups so a mistake is never final. Deploying it yourself means installing Node.js, configuring npm globally, writing systemd units, standing up a TLS reverse proxy, generating secure credentials and turning on authentication that the software leaves off by default. This AMI eliminates that effort entirely: a working, secured cron management endpoint is operational within minutes of launch, backed by 24/7 expert support.

## Application Stack

Crontab UI is installed globally with npm on Node.js 22 LTS and run by a dedicated unprivileged service account, so it manages that account's own crontab rather than root's, at least privilege. It binds the loopback interface only and an nginx reverse proxy terminates TLS on port 443 in front of it, with port 80 redirecting to HTTPS. The system cron daemon is enabled so scheduled jobs actually run. Saving a job in the interface writes it straight to the real crontab.

## Secure By Default

Crontab UI ships with no authentication at all, which means anyone who can reach it could schedule or run arbitrary commands on your server. This image closes that gap:

• HTTP Basic authentication is turned on for the whole interface
• A unique administrator credential is generated on each instance's first boot and written to a root only file
• There are no shared or default credentials and nothing usable is baked into the image
• The service refuses to start without a credential, so the open no authentication mode can never ship or boot
• The interface is served only over HTTPS, with a self signed certificate regenerated for the specific instance on first boot

## Ready To Use

Browse to the instance over HTTPS, sign in with the generated admin credential, and start scheduling. Create and edit jobs with a friendly form, pause or resume them, run a job on demand, view per job logs, and import, export or back up your whole crontab. The interface manages the crontab of the unprivileged service account, and autosave writes every change straight to the live crontab.

## What You Avoid By Using This AMI

• Manual Node.js and npm installation and version management
• Writing and debugging systemd service units
• Standing up nginx as a TLS reverse proxy in front of a loopback app
• Turning on authentication that the software leaves off by default
• Generating and securely storing per instance credentials
• Ongoing maintenance and security patching without expert guidance

## cloudimg Support

24/7 technical support by email and live chat with a one hour average response for critical issues. Our engineers help with deployment, restricting access to your own network, enabling a real domain and CA signed certificate, backing up and restoring crontabs, and scheduling best practice.

## Use Cases

• A safe, auditable web front end for managing cron jobs on a server without hand editing crontab text
• Team managed scheduled tasks with backups, import and export, behind authentication and TLS
• Running and inspecting periodic maintenance, backup and report jobs with per job logs

Crontab UI is a trademark of its respective owner. All product and company names are trademarks or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.