get_unique_line_count.sh

echo "File: unique (total - duplicate)"
for file in "$@"; do
    for compare in "$@"; do
        if [ "$file" == "$compare" ]; then
            continue;
        fi;
        cat $compare >> /tmp/get_unique_line_count-others.txt
    done;
    lines=$(cat $file | wc -l)
    duplicate=$(comm -12 <( sort $file ) <( sort /tmp/get_unique_line_count-others.txt ) | wc -l)
    let "unique = $lines - $duplicate"
    echo "$file: $unique ($lines - $duplicate)"
    rm /tmp/get_unique_line_count-others.txt
done;