Cron is a hypervisor for work schedules that executes assignments at predetermined intervals. These tasks, sometimes known as 'cron jobs,' are usually performed to maximize management or security.
Cron expressions are unique strings that indicate precise times or intervals to define the schedule for cron jobs to run. The five fields in these expressions - minute (0-59), hour (0-23), day of the month (1-31), month (1-12), and day of the week (0-7) - represent distinct time units.
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