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Provided by: acct_6.4~pre1-3ubuntu1_i386

 

NAME

        ac -  print statistics about users’ connect time
 

SYNOPSIS

        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 ]
 

DESCRIPTION

        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.
 
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.
 

OPTIONS

        -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.
 
        --complain
               When the wtmp file has a problem (a time-warp,  missing  record,
               or whatever), print out an appropriate error.
 
        --reboots
               Reboot records are NOT written at the time of a reboot, but when
               the system restarts; therefore, it is impossible to know exactly
               when  the  reboot occurred.  Users may have been logged into the
               system at the time of the reboot, and  many  ac     s  automatically
               count  the  time between the login and the reboot record against
               the user (even though all of that time shouldn’t be, perhaps, if
               the  system is down for a long time, for instance).  If you want
               to count this time, include the flag.  *For vanilla ac  compati‐
               bility, include this flag.*
 
        --supplants
               Sometimes,  a logout record is not written for a specific termi‐
               nal, so the time that the last user accrued cannot be  calculat‐
               ed.   If  you  want to include the time from the user’s login to
               the next login on the terminal (though probably incorrect),  in‐
               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
               flag.*
 
        --timewarps
               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.*
 
        --compatibility
               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‐
               tivity.
 
        --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.
 
        --debug
               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.
 

FILES

        wtmp
wtmp(5) for further de‐
               tails.
 

AUTHOR

        The   GNU   accounting   utilities   were   written   by   Noel   Cragg
        <noel@gnu.ai.mit.edu>.  The  man  page  was adapted from the accounting
        texinfo page by Susan Kleinmann <sgk@sgk.tiac.net>.
sa(8)
 
AC(1)
 

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