Provided by: mtr_0.86-1_i386 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]


       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

       -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 available).

       -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

       -C, --csv

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

       -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
              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 - 255.

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

       -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).