More than 5 years have passed since last update.
参考: CentOSにntpサーバを入れて、日本標準時刻に自動的に合わせるためのメモ - Qiita
/etc/ntp.conf追記
server -4 ntp.nict.jp
server -4 ntp1.jst.mfeed.ad.jp
server -4 ntp2.jst.mfeed.ad.jp
server -4 ntp3.jst.mfeed.ad.jp
service ntp restart
# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*ntp-b3.nict.go. .NICT. 1 u 14 64 37 5.197 0.670 0.291
ntp1.jst.mfeed. 172.29.2.50 2 u 10 64 37 3.725 0.907 0.267
ntp2.jst.mfeed. 172.29.1.100 2 u 4 64 37 3.652 0.314 0.365
ntp3.jst.mfeed. 172.29.3.60 2 u 9 64 37 3.625 0.284 0.410
各サーバの前に*とか+がつくと同期完了。
archlinuxの場合
pacman -Sy ntp
systemctl enable ntpdate
systemctl start ntpdate
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