The Linux hardware clock and system clock
(Doc ID 1542502.1)
Last updated on APRIL 21, 2020
Applies to:
Linux OS - Version Oracle Linux 5.0 to Oracle Linux 6.4 [Release OL5 to OL6U4]Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Linux x86
Purpose
There are two type of clocks in the Linux system - hardware clock and system clock.
This article describes the difference and relationship between them.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| 1: What are the hardware clock and system clock? |
| 2: Synchronising the hardware clock and system clock |
| 3: How the hardware clock and system clock are synchronized during system is shutdown |
| References |