Cron Jobs
Automated tasks that run on a schedule on Unix-based servers, like backups, database cleanups, or sending emails at specific times.
What are Cron Jobs?
Cron jobs are scheduled tasks that run automatically on Unix-based servers at specific times or intervals.
They're defined in a crontab file using a time-based syntax (minute, hour, day, month, day of week) plus the command to run. The cron daemon checks this file and executes jobs on schedule.
Most builders use them for database backups, log rotation, sending scheduled emails, or cleaning up temp files. You can set them to run every minute, daily at 3am, or the first Monday of each month.
Free and built into Linux/Unix systems. Most hosting platforms like DigitalOcean and AWS give you direct crontab access, or you can use services like Cronitor for monitoring.
Good to Know
Run tasks automatically on a schedule without manual intervention
Use five-field syntax: minute, hour, day, month, day of week, plus command
Built into Linux/Unix systems, no extra software needed
Common for backups, log rotation, database maintenance, and scheduled emails
Edit with 'crontab -e' command, view with 'crontab -l'
How Vibe Coders Use Cron Jobs
Running database backups every night at 2am while you sleep
Cleaning up temp files and old logs every Sunday to keep storage costs down
Sending weekly email digests to users at 9am on Mondays
Checking API health every 5 minutes and logging results
Generating daily reports and pushing them to Slack at 8am
Frequently Asked Questions
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