What is the use of linux hardware time?

Linux hardware time refers to the real-time clock on the computer hardware. Its role is reflected in two aspects: 1. It is used as the baseline of the system clock and can be synchronized with the network time protocol server; 2. It is used to record the system Events that occur and provide timestamps for these events

Operating system for this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux systems, hardware time (Hardware Clock) refers to the real-time clock on the computer hardware, also known as RTC (Real-Time Clock). The role of hardware time is mainly reflected in the following two aspects:

1. System time synchronization:

Hardware time can be used as the baseline for the system clock and can be synchronized with the network Time Protocol (NTP) server synchronization. The operating system generally reads the initial time from the hardware time during startup and maintains the accuracy and consistency of the system time by synchronizing with the NTP server.

When the system starts, the operating system loads the hardware time into the kernel and converts it to local time based on configurations such as time zone. Then, by communicating with the NTP server, the system time is adjusted to synchronize with the globally unified standard time.

2. Event recording and timestamps:

Hardware time can be used to record events that occur in the system and provide timestamps for these events. Many system logs, log files, applications, and network communications record timing information to help track and troubleshoot problems. The accuracy of hardware time is important for recording the sequence of events and diagnosing problems.

When an event occurs in the system, the application or operating system uses the hardware time as a timestamp to associate this timestamp with the event. In this way, the time when the event occurred can be clearly understood in the log or other records, which is helpful for analysis and debugging.

To summarize, hardware time is used in Linux systems to synchronize the system clock and provide timestamps. It is an important basis for ensuring the accuracy of system time and recording the time of event occurrence.

The above is the detailed content of What is the use of linux hardware time?. For more information, please follow other related articles on the PHP Chinese website!