Provided by: mtr-tiny_0.85-2_amd64 bug


       mtr - a network diagnostic tool


       mtr     [-hvrctglspeniuTP46]     [--help]     [--version]    [--report]    [--report-wide]
       [--report-cycles COUNT] [--curses]  [--split]  [--raw]  [--mpls]  [--no-dns]  [--show-ips]
       [--gtk]  [--address IP.ADD.RE.SS]  [--interval SECONDS] [--psize BYTES | -s BYTES] [--tcp]
       [--port PORT] [--timeout SECONDS] HOSTNAME [PACKETSIZE]


       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 purposely 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  packet  loss  or  response  time  is often an indication of a bad (or simply
       overloaded) link.

       The results are usually reported as  round-trip-response  times  in  miliseconds  and  the
       percentage of packetloss.



              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 performance.


              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 command line  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 packet
              size upto that number.


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


              Use  this  option  to tell mtr to display information from ICMP extensions for MPLS
              (RFC 4950) that are encoded in the response packets.


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


              Use  this option to tell mtr to display both the host names and numeric IP numbers.
              In split mode this adds an extra field to the output.  In  report  mode,  there  is
              usually  too  little space to add the IPs, and they will be truncated. Use the wide
              report (-w) mode to see the IPs in report mode.

       -o fields order

       --order fields order
              Use this option to specify the fields and their order when loading mtr.
              Available fields:

                                           │L │ Loss ratio          │
                                           │D │ Dropped packets     │
                                           │R │ Received packets    │
                                           │S │ Sent Packets        │
                                           │N │ Newest RTT(ms)      │
                                           │B │ Min/Best RTT(ms)    │
                                           │A │ Average RTT(ms)     │
                                           │W │ Max/Worst RTT(ms)   │
                                           │V │ Standard Deviation  │
                                           │G │ Geometric Mean      │
                                           │J │ Current Jitter      │
                                           │M │ Jitter Mean/Avg.    │
                                           │X │ Worst Jitter        │
                                           │I │ Interarrival Jitter │
              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


              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.

              Use UDP datagrams instead of ICMP ECHO.


              Use  TCP SYN packets instead of ICMP ECHO. PACKETSIZE is ignored, since SYN packets
              can not contain data.

       -P PORT

       --port PORT
              The target port number for TCP traces.

       --timeout SECONDS
              The number of seconds to  keep  the  TCP  socket  open  before  giving  up  on  the
              connection.  This  will  only  affect  the  final hop. Using large values for this,
              especially combined with a short interval, will use up a lot of file descriptors.

              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

       The mtr mailinglist was little used and is no longer active.

       Bug reports and feature requests should be submitted to the launchpad mtr bugtracker.


       traceroute(8), ping(8) TCP/IP Illustrated (Stevens, ISBN 0201633469).