How to check if a file contains only zeros in a Linux shell?

Question

How to check if a large file contains only zero bytes (\'\\0\') in Linux using a shell command? I can write a small program for this but this seems to be an ov

Answer 1

Completely changed my answer based on the reply here

Try

perl -0777ne'print /^\x00+$/ ? "yes" : "no"' file