Most *nix server and cloud nodes use bash for the shell. You're right about embedded systems but they're not usually the target platform for a config management system like this one or Ansible.

Yeah, I was mostly thrown by the reference to openwrt. I'm sure most/all GNU/Linux systems ship BASH.

Debian ship's dash for /bin/sh doesn't it?

but also ships bash for interactive use, so #!/bin/bash will just work, which you should be doing anyways in scripts that want bash.

If you use `env` instead, it'll pick up more recent versions of bash available on the path, such as the one installed by homebrew

    #!/usr/bin/env bash

/usr/bin/env bash?

It's common even for embedded systems which use busybox to provide /bin/bash because bash itself is not that large.