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Looks like the "ntpq -c rl" changes with every update of the NTP package.
Take the "ntpq -pn" output instead! To be processed like this in the shell script:
offset=$(
ntpq -pn | awk '/^
/...

It seems to me that you might profit in understanding from a bit of theory behind NTP and its workings. Here it goes:

Within a network it is vital to keep the timekeeping of the connected systems...

No, this is monitoring. Once monitoring detects an offset you must do a root cause analysis why your sync mechanism has failed.
Your sync mechanism:
ensure there is either ntpd running (needs a...

This ntpq is a measurement.
If you trust your NTP setup then you do not need a measurement.

BTW I just have changed my last post, added another check for the case that NTP service does not work...

Double posted.....continue here (https://www.unix.com/hp-ux/278338-script-detect-time-drift.html#post303017191)

Thread closed.