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Why this exists "It works when I run it, but not from cron" is one of the most common problems in operations. A cron job runs with almost no environment, no terminal and no one watching, so anything the script quietly…
Scheduling Jobs with cron and systemd Timers, Without the Usual Surprises
How to schedule scripts reliably: cron syntax, the minimal environment that breaks scripts, escaping percent signs, preventing overlapping runs, logging, a reusable wrapper, a heartbeat that alerts when a job stops running, and the systemd timer alternative.
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