Package adjtimex

A utility for adjusting kernel time variables

Adjtimex provides raw access to kernel time variables. On standalone
or intermittently connected machines, root can use adjtimex to correct
for systematic drift. If your machine is connected to the Internet or
is equipped with a precision oscillator or radio clock, you should
instead manage the system clock with the xntpd program. Users can use
adjtimex to view kernel time variables.

System Administration (Section 8)
adjtimex
This program gives you raw access to the kernel time variables. Anyone may print out the time variables, but only the superuser may change them. Your computer...