This is a simple yet robust backup automation script written in Bash, designed to run on Linux systems. It was created as a foundational project to practice Linux system administration and automation skills for a DevOps/Cloud engineering path.

This script performs two primary functions:

1. Automated Backup: It compresses a specified source directory (tar) and saves it to a target directory with a unique, timestamped filename (backup-YYYY-MM-DD.tar.gz).
2. Log Rotation: It automatically cleans up the target directory by deleting any backups older than 7 days, preventing disk space from filling up.

All actions (backup success, cleanup, errors) are logged with a timestamp to an external backup.log file for easy monitoring.

1. Make the script executable:

   chmod +x backup.sh

2. Run the script by providing the source and target directories as arguments:

   ./backup.sh /path/to/source_directory /path/to/backup_destination

   Example: ./backup.sh /home/ilhan/Documents /mnt/external_drive/backups

• Bash Scripting (Variables, Parameters, Functions, if conditions)
• Linux Core Utilities: date, echo, tar (for compression)
• File System: find (for locating files by time -mtime and deleting -delete)
• I/O Redirection: >> (for logging)