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# https://stackoverflow.com/questions/26365529/easiest-way-to-overwrite-a-series-of-files-with-zeros
for f in $(<list_of_files.txt)
do
read blocks blocksize < <(stat -c "%b %B" ${f})
dd if=/dev/urandom bs=${blocksize} count=${blocks} of=${f} conv=notrunc
rm ${f}
done
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