Abstract: This study addresses the data security requirements of Oracle databases by designing and implementing an automated offline backup solution for Linux environments, built on shell scripts and scheduled tasks. An integrated shell script was developed to sequentially execute steps, including configuring environment variables, shutting down the database, packaging and compressing data files with the tar command, cleaning up historical backups, and restarting the database, ensuring the consistency of backup data. The solution incorporates both the system timer and the crontab scheduler to achieve periodic, reliable task execution, with an extended feature for remote synchronization via the SCP tool. Practical applications demonstrated that this scheme effectively safeguards data security and integrity, significantly reduces manual maintenance overhead, and provides a stable and efficient reference implementation for database backup in similar environments.