Login other bash ttys after logging in to one

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http://unix.stackexchange.com – Is there a way to login certain (or all) ttys after logging into one? I don't want auto-login because I still want to login once (for security). I've looked into things like "screen" but they are rather cumbersome and don't work with some programs (e.g. fbgs). Is there a command to simulate logging in to other ttys? (HowTos)