Configure both container-getty@1 and console-getty to auto-login root with unified agetty options, ensuring either Proxmox noVNC (/dev/tty1) or pct/serial (/dev/console) works. Add stable _agetty_opts, write per-service override files, enable console-getty on distros that need it, and reload systemd. Disable vte profile scripts to avoid cursor-query noise on first prompt, restart only active getty services to avoid duplicates, and create /root/.hushlogin to suppress login messages.