̾??

ntptrace — NTP ??????Ϣ???򤿤ɤ??ץ饤?ޥ꥽?????ޤ????פ???

????

ntptrace [-vdn] [-r retries] [-t timeout] [server]

????

ntptrace ?桼?ƥ????ƥ??ϡ?Ϳ?????줿 ?ͥåȥ?????????ץ??ȥ??? (NTP) ?????Ф? ?ɤ????????????????????Τ??????ꤷ?? NTP ?????Ф?Ϣ???򤿤ɤäƥޥ??????諒?????ޤ??????ޤ??? ??????Ϳ???????ʤ??ä??Ȥ??ϡ? “localhost” ?????Ϥ??ޤ???

?ʲ??ϡ? ntptrace ?ν??Ϥ????Ǥ?:

% ntptrace
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'

?ƹԤΥե??????ɤ? (?????鱦??) ???Τ褦?ˤʤ??ޤ?: ?ۥ???̾???ۥ??Ȥγ??? (stratum)?? ???Υۥ??Ȥȥ????????ۥ??Ȥδ֤λ????Υ??ե??å? (ntptrace ?ˤ??ä?¬?ꤵ?줿????; ???줬 “localhost” ???Ф??Ƥ??Ĥ? 0 ?ˤʤ??Ȥϸ¤??ʤ???ͳ?Ǥ?)?? ?ۥ??Ȥ? Ʊ????Υ?? ?????? (???ؤ? 1 ?Υ????ФΤߤǤ???) ???ȥ????å? ID?? ???٤Ƥλ??֤???ñ?̤Ǥ??? Ʊ????Υ?Ȥϡ????פλ????????٤?¬?ä????ΤǤ????Τ??Ф??ơ? ???ؤȤϥץ饤?ޥ꥽???????Ф??륵???ФΥۥå׿??Ǥ??뤳?Ȥ????դ??Ƥ????????? ?????????Ѹ??? RFC 1305 ?ˤ????????Τ??????????Ƥ??ޤ???

?ʲ??Υ??ץ????󤬻??Ѳ?ǽ?Ǥ?:

-d

?ǥХå????Ϥ򥪥??ˤ??ޤ???

-n

?ۥ???̾??ɽ???򥪥դˤ??ޤ?; ???????ˡ??ۥ??Ȥ? IP ???ɥ쥹?? ɽ???????ޤ??? ?????ϡ??͡??ॵ???Ф??????Ƥ????Ȥ???ɬ?פˤʤ??Ǥ??礦??

-r retries

?ۥ??????κ??????β????򥻥åȤ??ޤ????ǥե????Ȥ? 5 ?Ǥ???

-t timeout

???????????»??? (??ñ??) ?򥻥åȤ??ޤ????ǥե????Ȥ? 2 ?Ǥ???

-v

NTP ?????Ф˴ؤ????ܺ٤ʾ????????Ϥ??ޤ???

??Ϣ????

ntpd(8), ntpdc(8) D L Mills, Network Time Protocol (Version 3), RFC1305.

?Х?

???Υץ????????ϡ?ʣ???Υ????ץ??????ä????٤????????褦?ʻ??ߤ򤷤ޤ?????