For mgetty users with non-trusted shell logins

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l41484@alfa.ist.utl.pt wrote:
> Wasn't aware of such a beast. Which combination is it, and where is it
> used?

To my knowledge it's something coming from SYSV, where it could have
been assigned to the Break (ie transmit level LOW for > 0.5 sec)
key.

On Linux it's the Magic SysRq + a few key strokes (like shift-control-alt-
sysreq-f5-mouse-down-1).

However I have no idea of the state of implementation. Anyway, if
it doesn't implement root-only-reopen it's useless (except if
ptylogin and mgetty is also run on vcon).