Why does changing the Linux system time not take effect?
How to completely modify the linux system
When you need to modify the Linux system time, in addition to the time settings at the software level, you also need to consider the impact of the hardware clock (RTC).
Step 1: Time modification at software level
(1) Check the current time and time zone
Before starting modification, use the following command to confirm the current system time and time zone settings:
datetimedatectl
(2) Set system time
Method 1. Manual modification
If you need to manually adjust the system time, you can use the date command. For example, to adjust the system time to 12:00 on February 21, 2024, you can execute the following command:
sudo date +%Y%m%d%H%M -s "202402211200"
Method 2. Use Network Time Protocol (NTP)
It is recommended to use Network Time Protocol (NTP) to ensure system time synchronization. Please confirm that the NTP service has been installed and running on the system, and then execute the corresponding command to manually synchronize time.
sudo ntpdate time.nist.gov
Alternatively, configure the NTP client to automatically synchronize time:
sudo timedatectl set-ntp true
(3) Modify time zone settings
If you need to modify the system's time zone settings, you can use the timedatectl command. For example, set the time zone to Beijing time (East Eighth District):
sudo timedatectl set-timezone Asia/Shanghai
Step 2: Process the hardware clock (RTC)
In addition to software-level time settings, the impact of the hardware clock (RTC) also needs to be considered. Hardware clocks typically run continuously to keep time even when the computer is turned off or loses power. Therefore, it is necessary to ensure the consistency of software time and hardware time.
(1) Write software time to hardware clock
Use the following command to write the software time to the hardware clock to ensure that they are consistent:
sudo hwclock --systohc
(2) Read time from hardware clock
If you need to read the time from the hardware clock to synchronize the system time, you can use the following command:
sudo hwclock --hctosys
Step 3: Verify modifications
After completing the modification of the time and time zone, run the date, timedatectl and hwclock commands again to verify whether the modification takes effect.
The above is the detailed content of Why does changing the Linux system time not take effect?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

1. First open DingTalk. 2. Open the group chat and click the three dots in the upper right corner. 3. Find my nickname in this group. 4. Click to enter to modify and save.

General Matrix Multiplication (GEMM) is a vital part of many applications and algorithms, and is also one of the important indicators for evaluating computer hardware performance. In-depth research and optimization of the implementation of GEMM can help us better understand high-performance computing and the relationship between software and hardware systems. In computer science, effective optimization of GEMM can increase computing speed and save resources, which is crucial to improving the overall performance of a computer system. An in-depth understanding of the working principle and optimization method of GEMM will help us better utilize the potential of modern computing hardware and provide more efficient solutions for various complex computing tasks. By optimizing the performance of GEMM

On July 29, at the roll-off ceremony of AITO Wenjie's 400,000th new car, Yu Chengdong, Huawei's Managing Director, Chairman of Terminal BG, and Chairman of Smart Car Solutions BU, attended and delivered a speech and announced that Wenjie series models will be launched this year In August, Huawei Qiankun ADS 3.0 version was launched, and it is planned to successively push upgrades from August to September. The Xiangjie S9, which will be released on August 6, will debut Huawei’s ADS3.0 intelligent driving system. With the assistance of lidar, Huawei Qiankun ADS3.0 version will greatly improve its intelligent driving capabilities, have end-to-end integrated capabilities, and adopt a new end-to-end architecture of GOD (general obstacle identification)/PDP (predictive decision-making and control) , providing the NCA function of smart driving from parking space to parking space, and upgrading CAS3.0

Douyin Blue V certification is the official certification of a company or brand on the Douyin platform, which helps enhance brand image and credibility. With the adjustment of corporate development strategy or the update of brand image, the company may want to change the name of Douyin Blue V certification. So, can Douyin Blue V change its name? The answer is yes. This article will introduce in detail the steps to modify the name of the enterprise Douyin Blue V account. 1. Can Douyin Blue V change its name? You can change the name of Douyin Blue V account. According to Douyin’s official regulations, corporate Blue V certified accounts can apply to change their account names after meeting certain conditions. Generally speaking, enterprises need to provide relevant supporting materials, such as business licenses, organization code certificates, etc., to prove the legality and necessity of changing the name. 2. What are the steps to modify the name of corporate Douyin Blue V account?

The best version of the Apple 16 system is iOS16.1.4. The best version of the iOS16 system may vary from person to person. The additions and improvements in daily use experience have also been praised by many users. Which version of the Apple 16 system is the best? Answer: iOS16.1.4 The best version of the iOS 16 system may vary from person to person. According to public information, iOS16, launched in 2022, is considered a very stable and performant version, and users are quite satisfied with its overall experience. In addition, the addition of new features and improvements in daily use experience in iOS16 have also been well received by many users. Especially in terms of updated battery life, signal performance and heating control, user feedback has been relatively positive. However, considering iPhone14

Win10 Sleep Time Modification Tips Revealed As one of the currently widely used operating systems, Windows 10 has a sleep function to help users save power and protect the screen when not using the computer. However, sometimes the default sleep time does not meet the needs of users, so it is particularly important to know how to modify the Win10 sleep time. This article will reveal the tips for modifying the sleep time of Win10, allowing you to easily customize the system’s sleep settings. 1. Modify Win10 sleep time through “Settings” First, the simplest fix

On April 11, Huawei officially announced the HarmonyOS 4.2 100-machine upgrade plan for the first time. This time, more than 180 devices will participate in the upgrade, covering mobile phones, tablets, watches, headphones, smart screens and other devices. In the past month, with the steady progress of the HarmonyOS4.2 100-machine upgrade plan, many popular models including Huawei Pocket2, Huawei MateX5 series, nova12 series, Huawei Pura series, etc. have also started to upgrade and adapt, which means that there will be More Huawei model users can enjoy the common and often new experience brought by HarmonyOS. Judging from user feedback, the experience of Huawei Mate60 series models has improved in all aspects after upgrading HarmonyOS4.2. Especially Huawei M

Dream Weaver CMS Station Group Practice Sharing In recent years, with the rapid development of the Internet, website construction has become more and more important. When building multiple websites, site group technology has become a very effective method. Among the many website construction tools, Dreamweaver CMS has become the first choice of many website enthusiasts due to its flexibility and ease of use. This article will share some practical experience about Dreamweaver CMS station group, as well as some specific code examples, hoping to provide some help to readers who are exploring station group technology. 1. What is Dreamweaver CMS station group? Dream Weaver CMS
