NTP
(At your own risk)
NTP関係パッケージ( ntp ntp-doc ntpdate)をインス
トールする。電波時計などのデバイスを有している場合はntp-simpleの替りに
ntp-refclockを入れる(単純に他Serverを参照する場合はntp-simpleでOK)。
/etc/ntp.conf
driftfile /var/lib/ntp/ntp.drift
statsdir /var/log/ntpstats/
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
server ntp.nc.u-tokyo.ac.jp
server clock.tl.fukuoka-u.ac.jp
server clock.nc.fukuoka-u.ac.jp
server 0.debian.pool.ntp.org iburst
server 1.debian.pool.ntp.org iburst
server 2.debian.pool.ntp.org iburst
server 3.debian.pool.ntp.org iburst
restrict -4 default kod notrap nomodify nopeer noquery
restrict -6 default kod notrap nomodify nopeer noquery
restrict 127.0.0.1
restrict ::1
broadcast x.x.x.255
disable auth
broadcastclient
/etc/default/ntpdate
NTPSERVERS="ntp.nc.u-tokyo.ac.jp clock.tl.fukuoka-u.ac.jp clock.nc.fukuoka-u.ac.jp pool.ntp.org"
動作確認
$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*ntp.nc.u-tokyo. .GPS. 1 u 45 64 377 18.343 -14.693 2.204
xclock.tl.fukuok .GPS. 1 u 32 64 377 35.566 -15.189 3.655
+clock.nc.fukuok .GPS. 1 u 38 64 377 34.677 -12.953 2.165
+boogey.rootshel 216.32.94.18 3 u 40 64 377 290.856 -24.715 2.644
LOCAL(0) LOCAL(0) 13 l 34 64 377 0.000 0.000 0.004
$ sudo netstat -uap | grep ntp
udp 0 0 smtp.n-yama.jp:ntp *:* 6363/ntpd
udp 0 0 localhost.localdoma:ntp *:* 6363/ntpd
udp 0 0 *:ntp *:* 6363/ntpd
udp6 0 0 *:ntp *:* 6363/ntpd
Last modified: Sun Apr 2 12:09:28 JST 2006