The Linux kernel keeps track of the system clock by counting timer interrupts. Read clock. To check the current system clock time (presented both in local time and UTC) as well as the RTC (hardware clock): $ timedatectl Set system clock. To set the local time of the system clock directly: # timedatectl set-time "yyyy-MM-dd hh:mm:ss" For example:
You can also use timedatectl to instruct your OS to accurately maintain the correct time by keeping it’s time in sync with a another trusted remote “ntp” server. This is done by running the following command: $ timedatectl set-ntp yes We can view a list of trusted ntp servers that the chronyd is using to sync the system-time. NTPD on ESX 3.0 |VMware Communities Oct 16 11:19:43 esx2 ntpd\[2602]: kernel time discipline status change 41. Oct 16 11:19:48 esx2 ntpd\[2602]: kernel time discipline status change 1 and after about 10 minutes have not yet recieved the lost sync notification. Does anyone know what the status change messages indicate? How to Set Clock Time on AD domain Controller and Sync
server hostnameof external time server. Save the file. In a command shell, execute the netconfig update-m ntpcommand. This command updates daemon. To verify the synchronization, open the /var/log/ntpfile,scroll to the bottom of the file, and check that the time synchronizationwas successful.
centos - Chrony 3.1 refuses to sync with ntp server - Unix Nov 12, 2017 How to Synchronize Time with NTP in Linux
Starting with Linux Kernel 2.6.18, the CPU's Time Stamp Counter is used to keep time, and when booting sometimes the Kernel mis-detects the frequency of this counter. This may result in severe clock drift which is impossible for ntpd to correct.
Apr 20, 2018 NTP – Keeping System time in sync on CentOS/RHEL 7 – CodingBee You can also use timedatectl to instruct your OS to accurately maintain the correct time by keeping it’s time in sync with a another trusted remote “ntp” server. This is done by running the following command: $ timedatectl set-ntp yes We can view a list of trusted ntp servers that the chronyd is using to sync the system-time.