Calculate space savings from deduplication with hardlinks (a la `jdupes -L` or `hardlink`)

get-reclaimed-hardlink-space.sh

find . -type f -links +1 -printf '%i %s\n' | # Find all files with more than one link (hardlinks), and print the inode and size
    sort | uniq -c |                         # Sort and unique, prefixing the number of repeated lines.
                                             #   Since all hardlinks point to the same inode, the count will be the number of
                                             #   files pointing to each unique inode. 
    awk '{print ($1-1)*$3}' |                # Multiply the first number minus one (redundant hardlinks) by the second number (size).
    awk '{n+=$1}; END{print n}' |            # Sum the results.
    numfmt --to=iec-i                        # Convert to an IEC i-size.