GNU/Linux Command – ADJTIMEX

adjtimex – Display/Set the kernel time variables.
This program gives you raw access to the kernel time variables, like clock tick, frequency, offset, PPL Time constant, etc.
$ adjtimex -p -- Print current kernel time values.  # adjtimex -w -- Provide time details and ask the user to approximate the accuracy.  # adjtimex -c -- Periodically (10Sec) compare the system clock  with the CMOS clock values and give suggestions.  # adjtimex -t 100001 -- Set the no of mSec that should be added to the system time for each kernel tick interrupt.  # adjtimex -f -408033 -- Set the system clock frequency offset.
Read: man adjtimex

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