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Path: utzoo!decvax!decwrl!ucbvax!info-pyramid
From: info-pyramid@ucbvax.UUCP
Newsgroups: mod.computers.pyramid
Subject: Re: problems with /etc/.attwtmp on OSx 2.5
Message-ID: <8512241622.AA24108@pluto.UUCP>
Date: Tue, 24-Dec-85 11:22:32 EST
Article-I.D.: pluto.8512241622.AA24108
Posted: Tue Dec 24 11:22:32 1985
Date-Received: Tue, 24-Dec-85 22:22:34 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 14
Approved: info-pyramid@mimsy.umd.edu

The att universe keeps its records of logins/logouts/reboots/date(I)
changes in /etc/wtmp (linked to /etc/.attwtmp).  This file is
read with "att who /etc/wtmp."

The ucb universe uses /usr/adm/wtmp (linked to /etc/.ucbwtmp) for
logins/logouts. This file is read with "ucb last."

I think that /bin/login writes to both of these files, which
makes sense since a user in either universe should be able to
see records of users in both universes.   Our .attwtmp is 2.7M
long since September, but we don't do lots of loggin in/out
here.  Anyway, if you delete it all you will lose is a record
of who has been logged in.  It will probably come back.  I guess
you could symbolically link it to /dev/null.