Remote Backup Script

This Bash script provides an automated solution for performing remote backups over SSH using rsync, with daily, weekly, and monthly rotation policies. The script supports a dry-run mode for safe testing and provides notifications upon backup completion or failure.

Features

• Remote backup via SSH using rsync
• Configurable via a simple key-value config file
• Daily, weekly, and monthly backup rotation
• Notification support using a notification script
• Dry-run mode for safe testing

Requirements

• Bash (version 4 or higher recommended)
• rsync
• ssh
• tar
• md5sum

Usage

./backup.sh <config_file> [--dry-run]

• <config_file>: Path to the configuration file describing remote and backup options.
• --dry-run: (Optional) Show what the script would do without making any changes.

How It Works

1. Daily Backup:

   • Syncs remote directory to a local daily backup directory using rsync.
   • Notifies of success or failure.

2. Weekly Backup (Sunday):

   • Copies the daily backup to a weekly directory every Sunday.
   • Notifies of success or failure.

3. Monthly Backup (1st of each month):

   • Archives the daily backup to a compressed tarball in the monthly directory.
   • Generates an MD5 checksum for the archive.
   • Notifies of success or failure.

4. Dry Run:

   • If --dry-run is specified, the script prints intended actions without making changes.

Customization

• Modify the notification script path if your system uses a different notification mechanism.
• Add or adjust rsync and tar options in the script or config file as needed.