On Tue, Apr 18, 2006 at 06:50:24PM +0000, you wrote:
`--lookup'
Attempt to canonicalize hostnames found in utmp through a DNS
lookup. This is not the default because it can cause significant
delays on systems with automatic dial-up internet access.
That does not say that it displays an ip. The wtmpx file stores both a
hostname and an IP. If you use --lookup it tries to resolve the IP and
display a canonical dns hostname. If you do not use --lookup it will
display whatever is in the wtmpx hostname field. (Which may or may not
be the canonical hostname; there is a length limit, and some programs
may not log the full hostname.) A future enhancement request might be an
option to display the IP instead of the hostname.
Mike Stone
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