Used for reading or changing the hardware clock - hwclock

Used for reading or changing the hardware clock. Usually requires root. More information: hwclock - manned.org.

  • Display the current time as reported by the hardware clock:

hwclock

  • Write the current software clock time to the hardware clock (sometimes used during system setup):

hwclock --systohc

  • Write the current hardware clock time to the software clock:

hwclock --hctosys