`hexdump` is a linux only tool

The hexdump command is linux-only, and apparently comes from the util-linux command. Something that is available on other platforms would be a better choice. I haven't followed my way through the script to figure out where all it uses this, so I don't know what features and formats are required. I do know that dehydrated has been working flawlessly on my Illumos-derived systems for years without hexdump installed. Maybe xxd would work? That seems to be widely available.

Search the dehydrated shell script for every hexdump invocation and inspect the formats and features each use requires. Compare those requirements with xxd and verify behavior on a non-Linux platform such as an Illumos-derived system. Done means the required behavior is preserved without depending on the Linux-only hexdump command.

Written by the indexing model from the issue text.