Provided by: mtr_0.80-1ubuntu1_i386 bug


       mtr - a network diagnostic tool


       mtr  [-hvrctglspniu46]  [--help] [--version] [--report] [--report-wide]
       [--report-cycles COUNT] [--curses] [--split] [--raw] [--no-dns] [--gtk]
       [--address IP.ADD.RE.SS]   [--interval SECONDS]   [--psize BYTES  |  -s


       mtr combines the functionality of the traceroute and ping programs in a
       single network diagnostic tool.

       As  mtr starts, it investigates the network connection between the host
       mtr runs on and HOSTNAME.  by sending packets with purposly  low  TTLs.
       It  continues to send packets with low TTL, noting the response time of
       the intervening  routers.   This  allows  mtr  to  print  the  response
       percentage  and  response  times  of the internet route to HOSTNAME.  A
       sudden increase in packetloss or response time is often  an  indication
       of a bad (or simply overloaded) link.



              Print the summary of command line argument options.


              Print the installed version of mtr.


              This  option  puts mtr into report mode.  When in this mode, mtr
              will run for the number of cycles specified by  the  -c  option,
              and then print statistics and exit.

              This  mode  is  useful  for  generating statistics about network
              quality.  Note that each running instance  of  mtr  generates  a
              significant amount of network traffic.  Using mtr to measure the
              quality  of  your  network  may  result  in  decreased   network


              This  option puts mtr into wide report mode.  When in this mode,
              mtr will not cut hostnames in the report.

       -c COUNT

       --report-cycles COUNT
              Use this option to set the number of  pings  sent  to  determine
              both  the  machines  on the network and the reliability of those
              machines.  Each cycle lasts one second.

       -s BYTES

       --psize BYTES

              These options or a trailing PACKETSIZE on the  commandline  sets
              the  packet  size used for probing.  It is in bytes inclusive IP
              and ICMP headers

              If set  to  a  negative  number,  every  iteration  will  use  a
              different, random packetsize upto that number.


              Use  this  option  to force mtr to use the curses based terminal
              interface (if available).


              Use this option to force mtr to display numeric IP  numbers  and
              not try to resolve the host names.

       -o fields order

       --order fields order
              Use  this  option  to  specify  the  fields and their order when
              loading mtr.
              Example: -o "LSD NBAW"


              Use this option to force mtr to use the GTK+  based  X11  window
              interface  (if available).  GTK+ must have been available on the
              system when mtr was built for this to work.  See  the  GTK+  web
              page at for more information about GTK+.


              Use this option to set mtr to spit out a format that is suitable
              for a split-user interface.


              Use this option to tell mtr to use the raw output  format.  This
              format is better suited for archival of the measurement results.
              It could be parsed to be presented into any of the other display

       -a IP.ADD.RE.SS

       --address IP.ADD.RE.SS
              Use  this  option  to  bind outgoing packets' socket to specific
              interface,  so  that  any  packet  will  be  sent  through  this
              interface.  NOTE  that this option doesn't apply to DNS requests
              (which could be and could not be what you want).

       -i SECONDS

       --interval SECONDS
              Use this option  to  specify  the  positive  number  of  seconds
              between   ICMP  ECHO  requests.   The  default  value  for  this
              parameter is one second.

              Use UDP datagrams instead of ICMP ECHO.

              Use IPv4 only.

              Use IPv6 only.


       Some modern routers give a lower priority to ICMP ECHO packets than  to
       other  network traffic.  Consequently, the reliability of these routers
       reported by mtr will be significantly lower than the actual reliability
       of these routers.


       For    the    latest    version,    see    the    mtr   web   page   at

       Subscribe to the mtr mailing list.  All mtr related  announcements  are
       posted   to  the  mtr  mailing  list.   To  subscribe,  send  email  to with subscribe mtr  in  the  body  of  the
       message.    To   send   a   message   to  the  mailing  list,  mail  to

       Bug reports and feature requests should be  sent  to  the  mtr  mailing


       traceroute(8), ping(8).