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[Ruby] Backup Verifier Script
The following ruby script compares two directories recursively, and alerts the user of any differences. It compares files by size and (optionally) by a random sample of contents. The results are summarized into a difference percentage so it can be used to easily determine if a backup is valid and recent.
Usage
Usage: /usr/bin/vfy [options] <original> <backup>
-v, --verbose Print what is being done
-m, --machine Output summary in machine-readable format
-f, --[no-]follow Follow symlinks
-x, --one-filesystem Stay on one file system (in <original>)
-c, --count Count files in unmatched directories
-i, --ignore DIR Don't process DIR
-s, --samples COUNT Comparison sample count (default: 0)
-h, --help Display this screen
-v, --verbose Print what is being done
-m, --machine Output summary in machine-readable format
-f, --[no-]follow Follow symlinks
-x, --one-filesystem Stay on one file system (in <original>)
-c, --count Count files in unmatched directories
-i, --ignore DIR Don't process DIR
-s, --samples COUNT Comparison sample count (default: 0)
-h, --help Display this screen
Sample Summary Output
SUMMARY:
Items processed: 457382
Differences: 1183 (0.26%)
Similarities: 456199
Skipped: 635
Errors: 1
Items processed: 457382
Differences: 1183 (0.26%)
Similarities: 456199
Skipped: 635
Errors: 1
