autopkgtest-virt-schroot(1) on Linux
The text 1b6c993e005e, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
autopkgtest virtualisation server using a schroot
Flags it lists
-
--debug -
-d