Find sparse files in Linux

find ./ -type f -printf "%S\t%p\n" | awk '$1 < 1.0 {print}'

find ./ -type f -printf "%S\t%p\n" | awk '$1 < 1.0 {print $2}'

To find and remove the sparse files:

find ./ -type f -printf "%S\t%p\n" | awk '$1 < 1.0 {print $2}' | xargs rm -f

To find and compress the sparse files:

find ./ -type f -printf "%S\t%p\n" | awk '$1 < 1.0 {print $2}' | xargs -I {} sh -c "tar -Sczvf {}.tar.gz {}; rm -f {}"