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           ac     [ -d | --daily-totals ] [ -y | --print-year ]
                  [ -p | --individual-totals ] [ people ]
                  [ -f | --file filename ] [ -a | --all-days ]
                  [ --complain ] [ --reboots ] [ --supplants ]
                  [ --timewarps ] [ --compatibility ]
                  [ --tw-leniency num ] [ --tw-suspicious num ]
                  [ -z | --print-zeros ] [ --debug ]
                  [ -V | --version ] [ -h | --help ]


           ac  prints  out  a  report  of connect time (in hours) based on the lo-
           gins/logouts in the current wtmp file.  A total is also printed out.
           The accounting file wtmp is maintained by init(8) and  login(1).   Nei-
           ther  ac  nor login creates the wtmp if it doesn't exist, no accounting
           is done.  To begin accounting, create the file with a length of zero.
           NOTE:  The wtmp file can get really big, really fast.  You  might  want
           to trim it every once and a while.
           GNU  ac  works  nearly the same u*x ac, though it's a little smarter in
           several ways.  You should therefore expect differences in the output of
           GNU  ac  and the output of ac's on other systems.  Use the command info
           accounting to get additional information.


           -d, --daily-totals
                  Print totals for each day rather than just one big total at  the
                  end.  The output looks like this:
                          Jul  3  total     1.17
                          Jul  4  total     2.10
                          Jul  5  total     8.23
                          Jul  6  total     2.10
                          Jul  7  total     0.30
           -p, --individual-totals
                  Print  time totals for each user in addition to the usual every-
                  thing-lumped-into-one value.  It looks like:
                          bob       8.06
                          goff      0.60
                          maley     7.37
                          root      0.12
                          total    16.15
           people Print out the sum total of the connect time used by all  of  the
                  users included in people.  Note that people is a space separated
                  list of valid user names; wildcards are not allowed.
           -f, --file filename
                  Read from the file filename instead of the system's wtmp file.
                  When the wtmp file has a problem (a time-warp,  missing  record,
                  or whatever), print out an appropriate error.
                  clude this you want to include the time from the user's login to
                  the next login on the terminal (though probably incorrect),  in-
                  clude  this  flag.   *For vanilla ac compatibility, include this
                  Sometimes, entries in a wtmp file will suddenly jump  back  into
                  the  past without a clock change record occurring.  It is impos-
                  sible to know how long a user was logged in  when  this  occurs.
                  If  you  want  to  count the time between the login and the time
                  warp against the user, include this flag.  *For vanilla ac  com-
                  patibility, include this flag.*
                  This is shorthand for typing out the three above options.
           -a, --all-days
                  If we're printing daily totals, print a record for every day in-
                  stead of skipping intervening days where there is no  login  ac-
                  tivity.   Without this flag, time accrued during those interven-
                  ing days gets listed under the next day where there is login ac-
           --tw-leniency num
                  Set  the  time  warp  leniency  to num seconds.  Records in wtmp
                  files might be slightly out of order (most notably when two  lo-
                  gins  occur  within  a  one-second  period - the second one gets
                  written first).  By default, this value is set to  60.   If  the
                  program  notices this problem, time is not assigned to users un-
                  less the --timewarps flag is used.
           --tw-suspicious num
                  Set the time warp suspicious  value  to  num  seconds.   If  two
                  records in the wtmp file are farther than this number of seconds
                  apart, there is a problem with the wtmp file  (or  your  machine
                  hasn't  been used in a year).  If the program notices this prob-
                  lem, time is not assigned to users unless the  --timewarps  flag
                  is used.
           -y, --print-year
                  Print year when displaying dates.
           -z, --print-zeros
                  If  a  total  for  any  category (save the grand total) is zero,
                  print it.  The default is to suppress printing.
                  Print verbose internal information.
           -V, --version
                  Print the version number of ac to standard output and quit.
           -h, --help
                  Prints the usage string and default locations of system files to
                  standard output and exits.


                  The  system  wide login record file. See wtmp(5) for further de-


           The   GNU   accounting   utilities   were   written   by   Noel   Cragg

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