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Interactive /dev/tty commands crash in LXC

Commands that read /dev/tty for passwords (e.g., `vaultwarden hash`) panic in LXC — no TTY available via pct exec. Use alternative CLI tools that accept piped input.

Piping input doesn't help if the binary hardcodes `/dev/tty`. For Vaultwarden, use the `argon2` CLI instead. Discovered during Vaultwarden deployment (2026-02-27).

Affected entities:Vaultwarden