Linux 2.6 - man page for chklastlog (linux section 1)
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chklastlog - check lastlog-file for deleted entries
Chklastlog is reading all entries from the file /var/log/wtmp (file with informations
about logins and logouts) and checks for every user found in this file whether there is an
entry in the file /var/log/lastlog, too. The program will complain about userids with
logins but no lastlogin information.
To run chklastlog you need read permission on the files /var/log/wtmp and /var/log/lastlo-
gin. Normally these files are world-readable and no special privileges are required to run
/var/log/wtmp login data base
/var/log/lastlog last login times
wtmp(4), who(1), last(1)
This program only works if the user has not logged in after the deletion of their lastlog
This program was designed to run on SunOS 4.x systems only. On other systems the output is
7th Edition Thu Oct 12 1994 CHKLASTLOG(1)
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