What is cron?
On Linux and similar systems, the mechanism (and its daemon) that runs commands automatically at set times or intervals. Each line of the settings edited with crontab -e is written as "minute hour day-of-month month day-of-week command", and "30 2 * * 1 command" means 2:30 every Monday (for the day of week, 0 is Sunday, and in many implementations so is 7). * means every value, */5 every 5 and 1-5 a range. Commands run from cron work with a more limited set of environment variables than a login session, so care is needed with paths and with recording output. On systems with systemd, systemd timers can do the same.
Japanese name: cron
cron appears in 1 practice question across 1 topic, including Linux and Command-Line Basics.