After installing the chrony NTP suite, you want the hardware Real-Time Clock (RTC) to stay accurate even when the system is powered off. Which single directive must be present in /etc/chrony/chrony.conf so that the kernel automatically copies the current system time into the RTC every 11 minutes once the clock is synchronized?
Add the line makestep 1.0 3 to the configuration file.
Add the line rtcsync to the configuration file.
Add the line rtconutc to the configuration file.
Add the line driftfile /var/lib/chrony/drift to the configuration file.
The rtcsync directive tells chronyd to enable the kernel's 11-minute mode. In this mode, once chronyd considers the system clock in sync, the kernel will periodically write the correct system time into the hardware RTC, keeping it accurate between reboots.
rtcsync - Correct choice; activates the automatic kernel copy from system clock to RTC.
makestep - Forces an immediate step if the initial offset is large; it does not update the RTC.
driftfile /var/lib/chrony/drift - Simply records the measured frequency drift of the system clock; it has no effect on the RTC.
rtconutc - Instructs chronyd to assume the RTC keeps UTC instead of local time, but it still leaves the RTC unchanged unless other mechanisms update it.
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