jhead(1) is a clone of head(1) for systems that does not have a full featured head(1). But it may have a couple of options not found in head(1).
If head(1) exists on your system, you should use that instead. It will be much faster.
Compile Instructions are in the README File inside the tarball.
$Id: jhead.gmi,v 1.4 2023/10/17 15:30:20 jmccue Exp $