Sh / Dash:
It's very likely that I'm using dash
- http://gondor.apana.org.au/~herbert/dash/
- http://en.wikipedia.org/wiki/Almquist%20shell
- https://blog.spiralofhope.com/?p=23919
On Debian, you can learn the version of dash
with one of:
\apt-cache showpkg dash
\apt-cache policy dash