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

       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 per-
       centage 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  perfor-

       --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  differ-
              ent, random packet size upto that number.


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


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


              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 load-
                                 |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 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  inter-
              face. NOTE that this option doesn't apply to DNS requests (which
              could be and could not be what you want).


              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 inter-
              val, 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 http://www.bitwiz-

       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).
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