Reported on a 26.04 offline install, first-boot step 2:
useradd: group 'netdev' does not exist
useradd refuses to create the user at all when any -G group is missing,
which stopped provisioning. Ubuntu 26.04 Server's base system has audio,
video, input and plugdev but no netdev (checked against the 26.04.1
ISO's /etc/group).
provision_create_kiosk_user now `groupadd -f -r`s each supplementary
group first (a no-op when it exists), then passes the same list to
useradd.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Cjz8a58eB5P9sUweqd3NHm
Claude