How to Automate Ubuntu Server Maintenance Using Cron Jobs and Bash

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A technical guide published on DEV Community outlines how to automate routine Ubuntu server maintenance using a custom Bash script scheduled via cron jobs. The script handles package list updates, package upgrades, removal of unused packages, APT cache cleaning, and optional Docker resource pruning. A file lock mechanism is included to prevent multiple instances of the script from running simultaneously, avoiding conflicts with the package manager. All maintenance activities are written to a dedicated log file at /var/log/system_maintenance.log for auditing purposes. The guide also covers configuring sudoers to allow passwordless execution of required commands, enabling the cron job to run without manual intervention.

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