This article is from a FAQ concerning SCO operating
systems. While some of the information may be applicable to any OS,
or any Unix or Linux OS, it may be specific to SCO Xenix, Open
Desktop or Openserver.
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These simply mean that someone telneted to the box and logged in incorrectly.
This means that SCO's TCB files are munged - someone has used a tyy that the system doesn't think exists. To bring everything in line, try (as root):
ttyupd /tcb/bin/ale /etc/auth/system/ttys pttyupd
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