+*-r*, *--release* _releasename_::
+
+ Specify release of new Debian system. Supported releases names:
+ jessie, stretch, buster, bullseye, bookworm and sid.
+ Corresponding with configuration variable RELEASE. Default release: bookworm
+
+*--remove-configs*::
+
+ Delete grml-debootstrap configuration files (/etc/debootstrap/*) from installed
+ system. Useful for reproducible builds or if you don't want to leak information.
+
+*--sshcopyauth*::
+
+ Use locally available _$HOME/.ssh/authorized_keys_ to authorise root login on the target system.
+ This installs _$HOME/.ssh/authorized_keys_ as _/root/.ssh/authorized_keys_ on
+ the target system. If a different file than _$HOME/.ssh/authorized_keys_ should
+ be used, the environment variable _AUTHORIZED_KEYS_SOURCE_ can be used.
+
+*--sshcopyid*::
+
+ Use locally available public keys to authorise root login on the target system.
+ Similar to ssh-copy-id(1) (without the -i option) it checks if `ssh-add -L`
+ provides any output, and if so those keys are appended to
+ _/root/.ssh/authorized_keys_ (creating the file and directory (with mode 0700)).