man > HWCLOCK(5)

HWCLOCK(5)                          Debian Administrator's Manual                         HWCLOCK(5)



NAME
       hwclock - settings that affect the behaviour of the hwclock init script

DESCRIPTION
       The /etc/default/hwclock file contains settings in POSIX format:

            VAR=VAL

       Only one assignment is allowed per line.  Comments (starting with '#') are also allowed.


SETTINGS
       The following settings can be set.


       HCTOSYS_DEVICE
              The  hardware  clock  device  you  want to use.  Defaults to rtc0.  It should probably
              match the CONFIG_RTC_HCTOSYS_DEVICE kernel config option.

              If you  change  this,  you  also  need  to  install  a  custom  udev  rule,  mirroring
              /usr/lib/udev/rules.d/85-hwclock.rules.  Otherwise,  the hardware clock device will be
              ignored during boot.

              On almost all systems, this should not be changed.


NOTES
       On systems using systemd as init, the hwclock init script is ignored.


SEE ALSO
       hwclock(8), systemd-timesyncd.service(8)



                                              Dec 2020                                    HWCLOCK(5)