Glossary term
What is Cron (from "chronos", time)?
Cron stands for from "chronos", time.
In System Design
Runs jobs on a schedule. Example: "Every night at 2 AM, clean expired sessions.".
Learn it properly · System DesignLesson 38: Background Jobs, Retries & Dead-Letter QueuesBackground jobs are easy to start and surprisingly easy to get wrong: poison jobs, retry storms, cron that runs twice, deploys that kill half-done work. How to design jobs, retry only what can succeed, and route what can't to a dead-letter queue you actually watch.In Linux & Shell
An older scheduler that runs the lines in a crontab at set times, with a very small environment.
Learn it properly · Linux & ShellLesson 6: Packages, Services, Cron and systemdapt and other package managers, running a service with systemd, reading unit files, journalctl, cron and systemd timers.