marc:linux:ntp
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Table of Contents
NTP:
Config file:
/etc/ntp.conf
timedatectl:
Gives information on time, date and timezone:
timedatectl
Local time: Sun 2021-11-21 11:57:23 CET
Universal time: Sun 2021-11-21 10:57:23 UTC
RTC time: Sun 2021-11-21 10:57:23
Time zone: Europe/Amsterdam (CET, +0100)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
Voorbeeld van ntp.conf:
## Use 'server' for a real NTP server and use 'pool' for ## a pool of servers if the ntp version supports it, ## otherwise define multiple server lines (See: www.pool.ntp.org/en/use.html) ## Added 'iburst' to speed up the initial synchronization. server 172.17.9.58 iburst ## Multiple server configuration is possible: server ntp-time.for.mydomain server otherntp.server.org server ntp.research.gov driftfile /var/lib/ntp/drift/ntp.drift logfile /var/log/ntp ## Key file containing the keys and key identifiers used when operating ## with symmetric key cryptography - disabled #keys /etc/ntp.keys ## Specify the key identifiers which are trusted. trustedkey 1 ## Specify the key identifier to use with the ntpdc utility. requestkey 1 ## mitigate CVE-2013-5211 in case we are running a version before 4.2.7p26 ## N/A for SLES12SP3 GA #disable monitor ## 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 limited nomodify notrap nopeer noquery restrict -6 default kod limited 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 -6 ::1
Om handmatig een sync te doen:
ntpdate -u 10.126.33.101 output: 29 Jun 09:45:03 ntpdate[1649]: step time server 10.126.33.101 offset 126.149871 sec
Apply changes:
service ntpd start or systemctl start ntpd
marc/linux/ntp.1637492273.txt.gz · Last modified: (external edit)
