NAME

       Blaeu - NTP measurements using RIPE Atlas probes

SYNOPSIS

       blaeu-ntp target-name-or-IP

DESCRIPTION

   General options are:

       --verbose or -v : makes the program more talkative

       --help or -h : this message

       --displayprobes or -o : display the probes numbers (WARNING: big lists)

       --displayprobeasns : display the (unique) probe ASNumbers (currently only for blaeu-resolve)

       --cache-probes=<file.json> : cache probe data

       --country=2LETTERSCODE  or  -c  2LETTERSCODE  :  limits  the  measurements  to  one  country  (default is
              world-wide)

       --area=AREACODE or -a AREACODE : limits the measurements to one area such as  North-Central  (default  is
              world-wide)

       --asn=ASnumber or -n ASnumber : limits the measurements to one AS (default is all ASes)

       --prefix=IPprefix  or  -f  IPprefix  : limits the measurements to one IP prefix (default is all prefixes)
              WARNING: it must be an *exact* prefix in the global routing table

       --probes=N or -s N : selects the probes by giving explicit ID (one ID or a comma-separated list)

       --requested=N or -r N : requests N probes (default is 5)

       --percentage=X or -p X : stops the program as soon as X % of the probes reported a result (default is  90
              %)

       --measurement-ID=N or -m N : do not start a measurement, just analyze a former one

       --old-measurement MSMID or -g MSMID : uses the probes of measurement MSMID

       --include TAGS or -i TAGS : limits the measurements to probes with these tags (a comma-separated list)

       --exclude  TAGS  or  -e  TAGS  : excludes from measurements the probes with these tags (a comma-separated
              list)

       --port=N or -t N : destination port for TCP (default is 80)

       --size=N or -z N : number of bytes in the packet (default is 64 bytes)

       --ipv4 or -4 : uses IPv4 (default is IPv6, except if the parameter or option is an IP address, then it is
              automatically found)

       --tags TAGS : tag the measurement (no relationship with probes tags) (a comma-separated list)

       --spread or -w : spreads the tests (add a delay before the tests)

       --private : makes the measurement private

       --resolve-on-probe : resolve names with the probe's DNS resolver

       --machine-readable or -b : machine-readable output, to be consumed by tools like grep or cut

SEE ALSO

       The full documentation for Blaeu is maintained as a Texinfo manual.  If the info and Blaeu  programs  are
       properly installed at your site, the command

              info Blaeu

       should give you access to the complete manual.

Blaeu version 2.1.1                               October 2024                                          BLAEU(1)