Developer Tools
Cron Expression
A string of numbers and stars that tells a computer exactly when to run a task.
Detailed Explanation
A Cron expression is a standard time-based job scheduler syntax in Unix-like computer operating systems. Users who set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or intervals. The standard 5-part format consists of Minute (0-59), Hour (0-23), Day of Month (1-31), Month (1-12), and Day of Week (0-6). You can test this using the Cron Generator.
Key Technical Takeaways
- Standard Unix cron expressions consist of 5 space-delimited fields.
- Asterisk (*) represents all possible values for that field.
- Step values (e.g. */5) indicate execution at specific repeating intervals.
- Cloud platforms like AWS CloudWatch often extend the standard syntax to 6 fields.
Interactive Companion Tool
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