I've confirmed on a 20.04 system recently installed from the official server ISO that the passphrase for the newly-created LUKS volume appears in the following files in /var/log/installer after install:
autoinstall-user-data curtin-install-cfg.yaml curtin-install.log installer-journal.txt subiquity-curtin-install.conf
I've confirmed on a 20.04 system recently installed from the official server ISO that the passphrase for the newly-created LUKS volume appears in the following files in /var/log/installer after install:
autoinstall- user-data curtin- install- cfg.yaml curtin-install.log installer- journal. txt subiquity- curtin- install. conf