ntp 원리와 설정
# For more information about this file, see the man pages
# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
driftfile /var/lib/ntp/drift
# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
#restrict default kod nomodify notrap nopeer noquery
#restrict -6 default kod nomodify notrap nopeer noquery
# Permit all access over the loopback interface. This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1
restrict ::1
# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
#
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
#
#restrict default ignore
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
# : http://www.pool.ntp.org/zone/cn
server 10.18.64.191 #ATS
#server cn.pool.ntp.org perfer #
#server 0.cn.pool.ntp.org # 1.cn.pool.ntp.org
#server 1.cn.pool.ntp.org
#server asia.pool.ntp.org
#server 0.asia.pool.ntp.org
#server 1.asia.pool.ntp.org
#server 0.centos.pool.ntp.org iburst
#server 1.centos.pool.ntp.org iburst
#server 2.centos.pool.ntp.org iburst
#server 3.centos.pool.ntp.org iburst
#broadcast 192.168.1.255 autokey # broadcast server
#broadcastclient # broadcast client
#broadcast 224.0.1.1 autokey # multicast server
#multicastclient 224.0.1.1 # multicast client
#manycastserver 239.255.254.254 # manycast server
#manycastclient 239.255.254.254 autokey # manycast client
# allow update time by the upper server
# #
restrict 10.18.64.191 nomodify notrap noquery
#restrict cn.pool.ntp.org nomodify notrap noquery
#restrict 0.cn.pool.ntp.org nomodify notrap noquery
#restrict 1.cn.pool.ntp.org nomodify notrap noquery
#restrict asia.pool.ntp.org nomodify notrap noquery
#restrict 0.asia.pool.ntp.org nomodify notrap noquery
#restrict 1.asia.pool.ntp.org nomodify notrap noquery
# ,
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 11
# Enable public key cryptography.
# crypto
includefile /etc/ntp/crypto/pw
# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography.
keys /etc/ntp/keys
# Specify the key identifiers which are trusted.
#trustedkey 4 8 42
# Specify the key identifier to use with the ntpdc utility.
#requestkey 8
# Specify the key identifier to use with the ntpq utility.
#controlkey 8
# Enable writing of statistics records.
#statistics clockstats cryptostats loopstats peerstats
[root@localhost ~]# date
2016 10 31 10:35:39 CST
[root@localhost ~]# systemctl stop ntpd
[root@localhost ~]# ntpdate 10.18.64.191
30 May 12:31:25 ntpdate[36306]: step time server 10.18.64.191 offset 81309314.623949 sec
[root@localhost 4.5_ntp_server]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*10.18.64.191 LOCAL(0) 4 u 51 128 377 0.320 0.012 0.021
LOCAL(0) .LOCL. 11 l 1869 64 0 0.000 0.000 0.000
[root@localhost 4.5_ntp_server]# ntpstat
synchronised to NTP server (10.18.64.191) at stratum 5
time correct to within 26 ms
polling server every 128 s
[root@localhost 4.5_ntp_server]# date
2019 05 30 13:41:12 CST
이 내용에 흥미가 있습니까?
현재 기사가 여러분의 문제를 해결하지 못하는 경우 AI 엔진은 머신러닝 분석(스마트 모델이 방금 만들어져 부정확한 경우가 있을 수 있음)을 통해 가장 유사한 기사를 추천합니다:
ESP8266의 ntp 설정은 한 줄로ntp (네트워크 시간 프로토콜)는 네트워크를 통해 시계를 맞추기위한 통신 규칙이며, 네트워크상의 시간 서버와 동기화하여 정확한 시간을 쉽게 얻을 수 있습니다. esp8266 Arduino에서도 이용할 수 있지만, ...
텍스트를 자유롭게 공유하거나 복사할 수 있습니다.하지만 이 문서의 URL은 참조 URL로 남겨 두십시오.
CC BY-SA 2.5, CC BY-SA 3.0 및 CC BY-SA 4.0에 따라 라이센스가 부여됩니다.