Cron is a background service (daemon) in Unix-like operating systems that automatically runs scheduled tasks, while a crontab (cron table) is the configuration file containing the list of commands and their exact execution schedules. Core Concepts
Cron Daemon (crond): The background process that wakes up every minute to check if any scheduled jobs need to run.
Cron Job: The individual task or script scheduled to run (e.g., database backups, system updates).
Crontab File: The personal or system-wide text file where your specific cron jobs are stored. The 5-Field Crontab Syntax
Each line in a user crontab file consists of five time and date fields, followed by the system path to the script or command you want to execute.
.—————- minute (0 - 59) | .————- hour (0 - 23) | | .———- day of month (1 - 31) | | | .——- month (1 - 12) | | | | .—- day of week (0 - 6) (Sunday is 0, Saturday is 6) | | | | |/path/to/command Use code with caution. Cron Jobs: The Complete Guide for 2026 – Cronitor
Leave a Reply