Abstract: This paper addresses the data security requirements of Oracle databases by designing and implementing an automated offline backup solution for Linux environments, based on Shell scripts and scheduled tasks. An integrated Shell script is developed to sequentially execute steps including environment variable configuration, database shutdown, packaging and compression of data files using the tar command, cleanup of historical backups, and database restart, ensuring the consistency of backup data. The solution incorporates both systemd timer and crontab schedulers to achieve periodic and reliable task execution, with an extended feature for remote synchronization using the scp tool. Practical application demonstrates that this scheme effectively safeguards data security and integrity, significantly reduces manual maintenance overhead, and provides a stable, efficient reference implementation for database backup in similar environments..