Provided by: vnstat_1.11-2_amd64 bug


       vnStat - a console-based network traffic monitor


       vnstat  [  -Ddhlmqrstuvw?   ]  [  --cleartop ] [ --config file ] [ --days ] [ --delete ] [
       --dbdir directory ] [ --debug ] [ --disable ] [ --dumpdb ] [  --enable  ]  [  --help  ]  [
       --hours  ]  [ -i interface ] [ --iface interface ] [ --iflist ] [ --live mode ] [ --locale
       locale ] [ --longhelp ] [ --months ] [ --nick nickname ] [  --oneline  ]  [  --query  ]  [
       --rateunit  ]  [  --rebuildtotal  ]  [  --reset  ]  [ -ru ] [ --savemerged ] [ --short ] [
       --showconfig ] [ --style number ] [ --sync ] [ --testkernel ] [ --top10 ] [ -tr time  ]  [
       --traffic time ] [ --update ] [ --version ] [ --weeks ] [ --xml ]


       vnStat  is  a  console-based  network traffic monitor. It keeps a log of hourly, daily and
       monthly network traffic for the selected interface(s). However, it isn't a packet sniffer.
       The  traffic  information  is  analyzed  from the proc(5) and sys filesystems depending on
       availability. That way vnStat can be used even without root permissions on most systems.


              Remove all top10 entries.

       --config file
              Use file as config file instead of using normal config file search function.

       -d, --days
              Show traffic for days.

       --dbdir directory
              Use directory as database directory instead of using the directory specified in the
              configuration file or the hardcoded default if no configuration file is available.

       -D, --debug
              Show additional debug output.

              Delete the database for the selected interface and stop monitoring it.

              Instead  of  showing the database with a formated output, this output will dump the
              whole database in a format that should be easy to parse with most script languages.
              Use  this  for example with PHP, Perl or Python to make a custom  webpage. The dump
              uses ; as field delimeter.

                    active;1             activity status
                    interface;eth0       name for the interface
                    nick;inet            nick (if given)
                    created;1023895272   creation date in Unix time
                    updated;1065467100   when the database was updated
                    totalrx;569605       all time total received MiB
                    totaltx;2023708      all time total transmitted MiB
                    currx;621673719      latest rx value in /proc

                    curtx;981730184      latest tx value in /proc
                    totalrxk;644         total rx KiB counter
                    totaltxk;494         total tx KiB counter
                    btime;1059414541     system boot time in Unix time

              Then follows 30 lines like the following


              where d = days, 0 = day number in database (0 is today), 1077314401  date  in  Unix
              time,  559  =  rx  MiB,  7433  = tx MiB, 68 = rx KiB, 557 = tx KiB and 1 tells that
              vnStat has filled this value and it is in use.

                    m;0;1078092000;48649;139704;527;252;1   (x12)
                    t;0;1078351200;5979;47155;362;525;1     (x10)
                    h;0;1078699800;118265;516545            (x24)

              m = months, t = top10 and h = hours, all other fields are in the same order  as  in
              days  except  hours that doesn't have a separate KiB value. For hours the forth and
              fifth fields have values in KiB.

       --enable, --disable
              Enable or disable updates for selected interface. Useful for interfaces that aren't
              always  available,  like  ppp0. If the interface goes down it should be disabled in
              order to avoid errors. Add something like vnstat -r --disable -i ppp0 to the script
              that's  executed when the interface goes down and vnstat --enable -i ppp0 to the up
              script. These two options aren't needed when the daemon is used.

       -h, --hours
              Show traffic for the last 24 hours.

       -i, --iface interface
              Select one specific interface and apply actions to only it.

              Show list of currently available interfaces.

       -l, --live mode
              Display current transfer rate  for  the  selected  interface  in  real  time  until
              interrupted.  Statistics  will  be shown after interruption if the runtime was more
              than 10 seconds. An optional mode parameter can  be  used  to  select  between  the
              displaying  of  packets  per  second (mode 0) and transfer counters (mode 1) during
              execution.  --style can also be used to affect the layout of the output.

       --locale locale
              Use locale instead of using the locale setting specified in the configuration  file
              or the system default if no configuration file is available.

              Show complete options list.

       -m, --months
              Show traffic for months.

       --nick nickname
              Set  the selected interfaces nickname as an alias the will be displayed in queries.
              Usage of -u is required to save the change.

              Show traffic summary for selected interface using one line with a parseable format.
              The  output  contains  15  fields  with  ;  used  as field delimeter. The 1st field
              contains the version information of the output  that  will  be  changed  in  future
              versions of vnStat if the field structure changes. The following fields in order 2)
              interface name, 3) timestamp for today, 4) rx for today, 5) tx for today, 6)  total
              for today, 7) average traffic rate for today, 8) timestamp for current month, 9) rx
              for current month, 10) tx for current month,  11)  total  for  current  month,  12)
              average  traffic  rate for today, 13) all time total rx, 14) all time total tx, 15)
              all time total traffic.

       -q, --query
              Force database query mode.

       -r, --reset
              Reset the internal counters in the database for the selected interface. Use this if
              the  interface  goes down and back up, otherwise that interface will get some extra
              traffic to its database.

              Reset the total traffic counters and recount those using recorded months.

       -ru, --rateunit
              Swap the configured rate unit. If rate has been configured to  be  shown  in  bytes
              then rate will be shown in bits if this option is present. In the same way, if rate
              has been configured to be shown in bits then rate will be shown in bytes when  this
              option  is  present. Alternatively 0 or 1 can be given as parameter for this option
              in order to select between bytes (0) and bits (1) regardless of  the  configuration
              file setting.

              Write the end result of a database merge to the file mergeddb that can then be used
              as a new database if renamed. Top10 traffic days isn't included in  the  merge  and
              will start empty in the new database.

       -s, --short
              Use  short  output  mode.  This  mode  is  also  used  if more than one database is

       --style number
              Modify the content and style of outputs. Set number to 0 for a more narrow  output,
              1  for  enabling  bar  column, 2 for same as previous but with average traffic rate
              visible in summary and weekly outputs and 3 for enabling average  traffic  rate  in
              all  outputs  where  it  is  supported.  4  disables  the  use  of terminal control
              characters in -l / --live mode.

       --sync Synchronize internal counters in the  database  with  interface  counters  for  the
              selected  interface.  Use  this  if  the  system is rebooted but interface counters
              aren't reseted. Such can occur when suspend to ram/disk is used.

              Test if the kernel boot time information always stays the same like it should or if
              it's shifting.

       -t, --top10
              Show all time top10 traffic days.

       -tr time
              Calculate  how  much  traffic  goes through the selected interface during the given
              time seconds. The time will be 5 seconds if a number parameter isn't included.

       -u, --update
              Update all enabled databases or only the one specified with -i parameter.

       -v, --version
              Show current version.

       -w, --weeks
              Show traffic for 7 days, current and previous week.

       --xml  Show database content for selected interface or all interfaces in xml  format.  All
              traffic values in the output are in KiB.

       -?, --help
              Show a command summary.


              This  directory  contains all databases the program uses. Files are named according
              to the monitored interfaces.

              Config file that will be used unless $HOME/.vnstatrc exists. See vnstat.conf(5) for
              more information.


       vnstat Display traffic summary for the default interface.

       vnstat -i eth0+eth1+eth3
              Display traffic summary for a merge of interfaces eth0, eth1 and eth3.

       vnstat -i eth2 --xml
              Output all information about interface eth2 in xml format.

       vnstat -u -i eth0
              Force  a  database  update  for interface eth0 or create the database if it doesn't
              exist. This is usually the first command used after a fresh install.

       vnstat -u -i eth0 --nick local
              Give interface eth0 the nickname "local". That  information  will  be  later  later
              visible  as  a  label  when eth0 is queried. The database will also be updated when
              this command is executed or created if the database doesn't exist.

       vnstat -i eth2 --delete
              Delete database of interface eth2 and stop monitoring it.


       Updates needs to be executed at least as often as it is  possible  for  the  interface  to
       generate  enough  traffic  to  wrap  the kernel interface traffic counter. Otherwise it is
       possible that some traffic won't be seen. This isn't an issue for 64 bit  kernels  but  at
       least  one update every hour is always required in order to provide proper input.  With 32
       bit kernels the maximum time between two updates depends on how  fast  the  interface  can
       transfer 4 GiB. Calculated theoretical times are:

              10 Mbit:        54 minutes
              100 Mbit:        5 minutes
              1000 Mbit:      30 seconds

       However,  for  1000  Mbit interfaces updating once every minute is usually still a working

       Estimated traffic values are likely to be somewhat inaccurate  if  daily  traffic  is  low
       because only the MiB counter is used to calculate the estimate.

       Virtual  and  aliased  interfaces  cannot  be monitored because the kernel doesn't provide
       traffic information for that type of interfaces. Such interfaces are usually named eth0:0,
       eth0:1, eth0:2 etc. where eth0 is the actual interface being aliased.


       Teemu Toivola <tst at iki dot fi>


       vnstatd(1), vnstati(1), vnstat.conf(5), proc(5), ifconfig(8), units(7)