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Use anacron to run daily/weekly/monthly maintenance scripts reliably on a machine that isn't powered on continuously (unlike cron)

Write a udev rule that runs a custom script automatically when a specific device is plugged in on Linux

avoid cron environment pitfalls around minimal PATH and unescaped percent signs when scripting crontab entries

handle logrotate copytruncate and dateext edge cases when rotating logs for daemons that can't be told to reopen their log file

use flock(1) to serialize concurrent runs of the same script and prevent overlapping cron/systemd-timer executions

Monitor file system changes on Linux using inotifywait from inotify-tools and react to events in a shell script

Create and manage Linux cron jobs for a user and for the system using crontab

Write a bash script using strict mode (set -euo pipefail) and trap-based error handling for robust automation