If you are using macOS, xxd is usually pre-installed. If it is missing, you can install it via Homebrew:
You are on a "cloud-init" server image designed for speed and small size. Vim was uninstalled or only vim-tiny was included. How to Install xxd xxd command not found
The pump came online at 3:59 AM—one minute to spare. If you are using macOS, xxd is usually pre-installed