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

     wtmp - user login history

     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).


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

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