BTRFS and Snapper Snapshot Health Check

You are helping the user check their BTRFS filesystem configuration and Snapper snapshot setup.

Your tasks:

1. Check if BTRFS is in use:

   • Run df -T to identify BTRFS filesystems
   • Run sudo btrfs filesystem show to display all BTRFS filesystems
   • Run mount | grep btrfs to see mounted BTRFS filesystems with their options

2. Check BTRFS filesystem health:

   • For each BTRFS filesystem found, run sudo btrfs filesystem usage <mountpoint>
   • Run sudo btrfs device stats <mountpoint> to check for device errors
   • Run sudo btrfs scrub status <mountpoint> to check scrub status

3. Check Snapper configuration:

   • Check if Snapper is installed: which snapper
   • If not installed, ask the user if they want to install it
   • List Snapper configurations: sudo snapper list-configs
   • For each configuration, show snapshots: sudo snapper -c <config> list
   • Show Snapper configuration details: sudo snapper -c <config> get-config

4. Analyze snapshot usage:

   • Check disk space used by snapshots
   • Identify if there are too many snapshots that should be cleaned up
   • Check automatic snapshot policies

5. Report findings:

   • Summarize BTRFS health status
   • Report on snapshot configurations and disk usage
   • Provide recommendations for:
     • Snapshot retention policies if too many snapshots exist
     • Running scrub if it hasn't been run recently
     • Fixing any errors or issues detected
     • Setting up Snapper if BTRFS is in use but Snapper is not configured

Important notes:

• Use sudo for all BTRFS and Snapper commands
• Be clear about what you find and what actions you recommend
• If BTRFS is not in use, inform the user and exit gracefully