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ntptrace (1)
  • >> ntptrace (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • ntptrace (8) ( FreeBSD man: Команды системного администрирования )
  • ntptrace (8) ( Linux man: Команды системного администрирования )
  •  

    NAME

    ntptrace - trace a chain of NTP hosts back to their master time source
     
    

    SYNOPSIS

    /usr/sbin/ntptrace [-vdn] [-r retries] [-t timeout] 
        [server]
    

     

    DESCRIPTION

    ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to their master time source. If given no arguments, it starts with localhost.  

    OPTIONS

    The following options are supported:

    -d

    Turns on some debugging output.

    -n

    Turns off the printing of host names; instead, host IP addresses are given. This may be necessary if a nameserver is down.

    -r retries

    Sets the number of retransmission attempts for each host.

    -t timeout

    Sets the retransmission timeout (in seconds); default = 2.

    -v

    Prints verbose information about the NTP servers.

     

    EXAMPLES

    Example 1 Sample Output From the ntptrace Command

    The following example shows the output from the ntptrace command:

    % ntptrace
    
    
     localhost: stratum 4, offset 0.0019529, synch distance 0.144135
     server2.bozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
     usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
    

    On each line, the fields are (left to right):

    o The server's host name
    o The server's stratum
    o The time offset between that server and the local host (as measured by ntptrace; this is why it is not always zero for localhost)
    o The host's synchronization distance
    o The reference clock ID (only for stratum-1 servers)

    All times are given in seconds. Synchronization distance is a measure of the goodness of the clock's time.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    AvailabilitySUNWntpu

     

    SEE ALSO

    xntpd(1M), attributes(5)  

    BUGS

    This program makes no attempt to improve accuracy by doing multiple samples.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    EXAMPLES
    ATTRIBUTES
    SEE ALSO
    BUGS


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