It seems this is already done by login. Having tryied to log in as (nonexistent) user foobar: $ lastb UNKNOWN Sun Sep 24 01:26 - 01:26 (00:00) -- Sam Morris http://robots.org.uk/ PGP key id 1024D/5EA01078 3412 EA18 1277 354B 991B C869 B219 7FDB 5EA0 1078
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