Build, test, and understand crontab syntax with 1-click presets for WordPress, Laravel scheduler, Python scrapers, and cPanel automation.
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Crontab Reference
A crontab entry consists of 5 time and date fields followed by the command to execute.
| Field | Allowed Values | Special Characters | Example |
|---|---|---|---|
| 1. Minute | 0 – 59 | * , - / | */5 (every 5 mins) |
| 2. Hour | 0 – 23 (24-hour format) | * , - / | 0,12 (midnight and noon) |
| 3. Day of Month | 1 – 31 | * , - / ? L W | 1 (first day of month) |
| 4. Month | 1 – 12 or JAN – DEC | * , - / | */3 (quarterly) |
| 5. Day of Week | 0 – 6 (0 = Sunday) or SUN – SAT | * , - / ? L # | 1-5 (Monday to Friday) |
Log in to your cPanel dashboard and scroll down to the Advanced section. Click Cron Jobs. Paste the generated crontab schedule and command line string into the input fields and click Add New Cron Job.
WordPress default wp-cron.php triggers on every website page visit. On high-traffic sites, this creates excessive PHP processes and can trigger CloudLinux 508 resource limit errors. Setting up a real cPanel cron every 10 minutes executes tasks reliably without impacting visitor load times.
> /dev/null 2>&1 mean?> /dev/null instructs the operating system to discard standard output (STDOUT), and 2>&1 redirects standard error (STDERR) to the same location. This prevents your server from sending an email on every single successful cron execution.