# Ch18-Cron-Scheduling-and-Automation

- [18.1 Cron System Design](/en/ch18-cron-scheduling-and-automation/18.1-cron-system-design.md)
- [18.2 Cron Job Execution](/en/ch18-cron-scheduling-and-automation/18.2-cron-job-execution.md)
- [18.3 Webhooks and Gmail Pub/Sub](/en/ch18-cron-scheduling-and-automation/18.3-webhooks-and-gmail-pubsub.md)