Cron Generator

Cron is a task scheduler for Unix/Linux. It lets you run commands and scripts on a schedule: backups, email campaigns, cache cleanup, and synchronization. An expression with 5 fields specifies the minute, hour, day of the month, month, and day of the week.

Format: minute hour day_of_month month day_of_week. For example: 0 2 * * * — every day at 2:00. */5 * * * * — every 5 minutes. 0 9 * * 1-5 — at 9:00 on weekdays. Sunday = 0 or 7.

Cron is a classic scheduler that's simple to configure. systemd timers are more flexible, with dependencies and logging. Cron is enough for simple tasks (once a day, once an hour). Consider systemd for more complex scenarios.

Add this line to crontab: 0 * * * * /usr/bin/php /path/to/script.php. Specify the full paths to PHP and the script. Check that the script has execute permissions. Logging: 0 * * * * /usr/bin/php /path/script.php >> /var/log/script.log 2>&1

Check: 1) that the expression is correct (crontab.guru); 2) the path to the executable; 3) environment variables (cron has a minimal env — specify PATH); 4) user permissions; 5) logs in /var/log/syslog or journalctl.