Provided by: mtr-tiny_0.86-1ubuntu0.1_amd64 bug


       mtr - a network diagnostic tool


       mtr  [-4|-6]  [-F FILENAME]  [--report] [--report-wide] [--xml] [--gtk] [--curses] [--raw]
       [--csv]   [--split]   [--no-dns]   [--show-ips]   [-o FIELDS]   [-y IPINFO]   [--aslookup]
       [-i INTERVAL]  [-c COUNT]  [-s PACKETSIZE]  [-B BITPATTERN] [-Q TOS] [--mpls] [-a ADDRESS]
       [-f FIRST-TTL] [-m MAX-TTL] [--udp] [--tcp] [-P PORT] [-Z TIMEOUT] [-M MARK] HOSTNAME


       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.


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

       -v, --version
              Print the installed version of mtr.

       -4     Use IPv4 only.

       -6     Use IPv6 only.  (IPV4 may be used for DNS lookups).

       -F FILENAME, --filename FILENAME

       -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.

       -x, --xml
              Use  this  option  to tell mtr to use the xml output format.  This format is better
              suited for automated processing of the measurement results.

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

       -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 for more information
              about GTK+.

       -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.

       -C, --csv

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

       -n, --no-dns
              Use  this  option to force mtr to display numeric IP numbers and not try to resolve
              the host names.

       -b, --show-ips
              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 FIELDS
              Use this option to specify which fields to display and in which order.  You may use
              one or more space characters to separate fields.
              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  X"

       -y n, --ipinfo n

       -z, --aslookup

       -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.  The root user may
              choose values between zero and one.

       -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 PACKETSIZE, --psize PACKETSIZE
              This  option  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 up to that number.

       -B NUM, --bitpattern NUM
              Specifies  bit  pattern to use in payload.  Should be within range 0 - 255.  If NUM
              is greater than 255, a random pattern is used.

       -Q NUM, --tos NUM
              Specifies value for type of service field in IP header.  Should be within range 0 -

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

       -a ADDRESS, --address ADDRESS
              Use this option to bind the outgoing socket to ADDRESS, so that all packets will be
              sent  with  ADDRESS  as source address.  NOTE that this option doesn't apply to DNS
              requests (which could be and could not be what you want).

       -f NUM, --first-ttl NUM
              Specifies with what TTL to start.  Defaults to 1.

       -m NUM, --max-ttl NUM
              Specifies the maximum number of  hops  (max  time-to-live  value)  traceroute  will
              probe.  Default is 30.

       -u, --udp
              Use UDP datagrams instead of ICMP ECHO.

       -T, --tcp
              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.

       -Z SECONDS, --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.

       -M MARK, --mark MARK


       mtr recognizes a few environment variables.

              This environment variable allows to specify options, as if they were passed on  the
              command line.  It is parsed before reading the actual command line options, so that
              options specified in MTR_OPTIONS are overriden by command-line options.


              MTR_OPTIONS="-4 -c 1" mtr -6 localhost

              would send one probe (because of -c 1) towards ::1 (because of -6, which  overrides
              the -4 passed in MTR_OPTIONS).

              Used for the GTK+ frontend.


       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.

       For  patches,  bug  reports,  or  feature  requests,  please  open  an issue on GitHub at:


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