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What is Driftfile in NTP?
The driftfile entry in /etc/ntp. conf tells ntpd the name of the file where it can find and store the clock drift, also known as frequency error, of the system clock. If the file exists at startup, it is read and the value is used to initialize ntpd’s internal value of the frequency error.
Where is ntpd config file?
/etc/ directory
conf file is a text file with configuration information for the NTP daemon, ntpd . On Unix-like systems it is commonly located in the /etc/ directory, on Windows system in the directory C:\Program files (x86)\NTP\etc\ or C:\Program files\NTP\etc\ .
What is the main config file of the ntpd process?
ntp.conf
The ntp. conf configuration file is read at initial startup by the ntpd(8) daemon in order to specify the synchronization sources, modes, and other related information. Usually, it is installed in the /etc directory, but could be installed elsewhere (see the daemon’s -c command line option).
What is ETC NTP step tickers?
A Step Ticker is basically a way to tell the NTP daemon to check a server or two, and correct time on startup, rather than relying on the time that was restored from the hardware. This is meaningful, because often the hardware time has drifted. So setting up Step Tickers is a “Good Idea”.
When does ntpd exit from the driftfile?
This is the same operation as the driftfile driftfile configuration command. Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once.
When does ntpd read ntp.conf configuration file?
The Configuration File. Ordinarily, ntpd reads the ntp.conf configuration file at startup in order to determine the synchronization sources and operating modes. It is also possible to specify a working, although limited, configuration entirely on the command line, obviating the need for a configuration file.
What happens when ntpd exceeds the Panic threshold?
Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that, ntpd will exit with a message to the system log.
How does ntpd work in one time mode?
ntpd normally operates continuously while monitoring for small changes in frequency and trimming the clock for the ultimate precision. However, it can operate in a one-time mode where the time is set from an external server and frequency is set from a previously recorded frequency file.