    WTMP(V)                      2/22/74                      WTMP(V)

    NAME
         wtmp - user login history

    DESCRIPTION
         This file records all logins and logouts.  Its format is ex-
         actly like utmp(V) except that a null user name indicates a
         logout on the associated typewriter.  Furthermore, the type-
         writer name `~' indicates that the system  was  rebooted  at
         the  indicated time; the adjacent pair of entries with type-
         writer names `|' and `}' indicate the system-maintained time
         just  before  and  just after a date command has changed the
         system's idea of the time.

         Wtmp is maintained by login(I) and init(VIII).  Neither of
         these programs creates the file, so if it is removed record-
         keeping is turned off.  It is summarized by ac(VIII).

    FILES
         /usr/adm/wtmp

    SEE ALSO
         utmp(V), login(I), init(VIII), ac(VIII), who(I)

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