Provided by: mtr_0.80-1ubuntu1_amd64 bug

NAME

       mtr - a network diagnostic tool

SYNOPSIS

       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  BYTES]  HOSTNAME
       [PACKETSIZE]

DESCRIPTION

       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.

OPTIONS

       -h

       --help
              Print the summary of command line argument options.

       -v

       --version
              Print the installed version of mtr.

       -r

       --report
              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
              performance.

       -w

       --report-wide
              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

       PACKETSIZE
              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.

       -t

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

       -n

       --no-dns
              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"

       -g

       --gtk
              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 http://www.gtk.org/  for  more  information
              about GTK+.

       -p

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

       -l

       --raw
              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 methods.

       -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.

       -u
              Use UDP datagrams instead of ICMP ECHO.

       -4
              Use IPv4 only.

       -6
              Use IPv6 only.

BUGS

       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.

CONTACT INFORMATION

       For the latest version, see the mtr web page at http://www.bitwizard.nl/mtr/.

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

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

SEE ALSO

       traceroute(8), ping(8).