Timedatectl system clock synchronized. Using timedatectl to Sync your Raspberry Pi’s Time.

Timedatectl system clock synchronized Linux Commands Cheat Sheet You can use timedatectl to print out systemd’s current understanding of the time: timedatectl. 04 has time synchronization built-in and activated by default using systemd ’s timesyncd service. First of all, let’s display with timedatectl our time information: $ timedatectl Local time: Fri 2022-04-29 14:24:42 EDT Universal time: Fri 2022-04-29 18:24:42 UTC RTC time: Fri 2022-04-29 18:24:42 Time zone: America timedatectl may be used to query and change the system clock and its settings, and enable or disable time synchronization services. # timedatectl set-ntp off # timedatectl set-ntp on # timedatectl status Local time: Fri 2021-08-06 20:01:43 EDT Universal time: Sat 2021-08-07 00:01:43 UTC RTC time: Fri 2021-08-06 20:01:43 Time zone: America/New_York (EDT, -0400) System clock synchronized: no #查看NTP状态 timedatectl status 或者 timedatectl Local time: Fri 2023-01-06 14:41:01 CST Universal time: Fri 2023-01-06 06:41:01 UTC RTC time: Fri 2023-01-06 06:41:01 Time zone: Asia/Shanghai (CST, +0800) System clock synchronized: yes NTP service: active RTC in local TZ: no . If you need to set the time manually see unix. timedatectl may be used to show the current status of time synchronization services, for example systemd-timesyncd. [root@Arch ~]# timedatectl Local time: Fri 2022-03-11 20:42:55 +06 Universal time: Fri 2022-03-11 14:42:55 UTC RTC time: Fri 2022-03-11 14:42:56 Time zone: Asia/Dhaka (+06, +0600) System clock synchronized: no NTP service: active RTC in local TZ: no i wanted to set " System clock synchronized: no" to " System clock synchronized: yes" no timedatectl程序可以自动同步Linux系统时钟到使用NTP的远程服务器命令timedatectl的使用。 status _system clock synchronized no. In this article, you will practice some general time-related The timedatectl command only changes the system clock, which is the main clock used by your operating system and apps. or a different service might synchronize the clock. You need to disable it using the below command. Set the hardware clock from the system clock on shutdown. I tried so much different things of installing ntpq or other stuff but nothing works. Time synchronization is disabled. Standard behavior of most operating systems is: Set the system clock from the hardware clock on boot. Hope this This article explains how to use timedatectl to change the timezone and enable automatic synchronization of the system clock with a remote server using the NTP (Network Time Protocol) on Linux. That はじめに CentOS7のNTPによる時刻同期ができていない環境にて、NTPによる時刻同期を行う流れについて記載しました。 尚、時刻同期ができている状態とはtimedatectlコマンドの結果が以下という状態を指しています。 # timedatectl NTP enabled: yes NTP synchronized: yes 環境情報 CentOS Linux 7. Otherwise, the RTC is synchronized from the system clock. It’s possible to change this default behavior in the system settings, under “Date & Time”, or via the command line ‘timedatectl’. Now check with timedatectl. 9w次，点赞2次，收藏14次。本文介绍了如何使用timedatectl更改时区，以及如何使用Linux上的NTP（网络时间协议）与远程服务器自动同步系统时钟。timedatectl是systemd的一部分，可作为命令行实用程序使用，它允许更改系统时钟的各种设置。如何使用timedatectl在Linux上更改时区在更改时区之前 System clock synchronized: yes NTP service: active RTC in local TZ: no. But in the corner of my screen, the system tray, that clock is correctly set to the correct local time zone. timedatectl may be used to show the current status of time synchronization services, for example systemd user1@linuxconfig:~$ timedatectl Local time: Wed 2020-03-11 22:06:50 -05 Universal time: Thu 2020-03-12 03:06:50 UTC RTC time: Thu 2020-03-12 03:06:51 Time zone: America/Lima (-05, -0500) System clock synchronized: yes NTP service: inactive RTC in local TZ: no (-05, -0500) System clock synchronized: no NTP service: inactive RTC in local TZ I am unable to get a "yes" for "System clock synchronized" on my VPS (Ubuntu 22. stackexchange. Improve this answer. timedatectl Local time: Mon 2020-09-07 06:06:59 BST Universal time: Mon 2020-09-07 05:06:59 timedatectl. Use timedatectl to activate the NTP service if your output indicates that it isn't running: sudo timedatectl set-ntp on Run timedatectl once more to verify the network time status after that. However, protocols have been devised primarily to maintain the coordination Enable System clock synchronization (10 answers) Closed 6 years ago. timedatectl is a command line utility available as part of systemd that allows changing various settings of your system clock. Changed firewall settings for outbound UDP port 123 to all ipv4, then In this guide, we want to teach you How To Set up Time Synchronization on AlmaLinux 9. 7 ntp. An easy solution for an unsynchronized clock on Linux. service. (CEST, +0200) System clock synchronized: no NTP service: active RTC in local TZ: no may 22 00:31:38 falcon systemd-timesyncd[73828]: System clock time unset or jumped backwards, restoring from Because timedatectl says that the NTP service is active but the clock is still not synchronized, that means the NTP service is failing to contact any NTP servers, possibly because the service is not fully configured or because a firewall is blocking NTP packets. You can find the details I run this command I saw that my system clock is not synchronized. 200:123 (172. No idea how I caused this trouble Description¶. e. Use systemd-firstboot(1) If set-local-rtc is invoked and this option is passed, the system clock is synchronized from the RTC again, taking the new setting into account. As mentioned earlier, the Raspberry Pi uses the timedatectl package to keep its time in sync. Follow answered Feb 17, The System clock synchronized comes from the kernel's timekeeping status bits: when a NTP service is running and has successfully synchronized the system clock to a NTP time source, it will flip the appropriate bits in the kernel's time_status word using the adjtimex(2) system call. Otherwise the RTC is synchronized from the system clock. destructor@orangepiplus:~$ timedatectl Local time: Mon 2020-05-18 14:05:45 EEST Universal time: Mon 2020-05-18 11:05:45 UTC RTC time: Tue 1970-01-06 15:48:55 Time zone: Europe/Kiev (EEST, +0300) System clock synchronized: no NTP s Yes, it is connected to a network, however, the network can be slow at times at these are remote robotic systems. service Enable it at boot so every time you boot the system the clock will be synchronized # systemctl start ntpd. If timedatectl does not By using timedatectl, an admin can control the timezone, how the system clock should relate to the hwclock and whether permanent synchronisation should be enabled. The following commands are understood: status Show current settings of the system clock and RTC. Time Synchronization on Raspberry Pi: Timedatectl What is Timedatectl on Today I noticed that my computer clock was off after rebooting. Configure Real-Time Clock With timedatectl. timezone is not set automatically, which I expect it would be possible, probably given the assigned IP address or something. NTP synchronized: yes the time is immediately automatically synchronized. service Start it immediately. Local time: Tue 2020-10-06 13:35:31 PDT Universal time: Tue 2020-10-06 20:35:31 UTC RTC time: Tue 2020-10-06 20:35:30 Time zone: America/Los_Angeles (PDT, -0700) System clock synchronized: no NTP service: active RTC in local TZ: no -0700) System clock synchronized: no NTP service: active RTC in local TZ: no /etc System Clock Synchronized: Whether the system clock is synchronized with an NTP server. +0100) System clock synchronized: yes NTP service: n/a RTC in local TZ: no. -H, --host= $ timedatectl status Local time: Mon 2021-11-01 12:54:41 JST Universal time: Mon 2021-11-01 03:54:41 UTC RTC time: Mon 2021-11-01 03:54:41 Time zone: Asia/Tokyo (JST, +0900) System clock synchronized: yes systemd-timesyncd. Mahdi Mallaki · Follow. 9 wait for the time to synchronise (check with timedatectl status, system clock sync will say "yes") then switch it back to the pi's ip address. The error says that the NTP service is active. conf, and The other items inform you whether the system clock is synchronized with an NTP server (for real-time update using the internet), whether that NTP service is active, and whether the RTC is using the local time instead of UTC. The timedatectl utility enables you to automatically sync your Linux system clock with a remote group of servers using NTP. By using timedatectl, an admin can control the timezone, how the system clock should relate to the hwclock and whether permanent synchronisation should be enabled. timedatectl set-local-rtc 0 Configure timedatectl ¶. Computer time synchronization is the process of ensuring that the system clocks of computers are coordinated. To This article explains how to use timedatectl to change the timezone and enable automatic synchronization of the system clock with a remote server using the NTP (Network The Timedatectl Command. You will get a list of time zones in your output: America/New_York (EDT, -0400) System clock running timedatectl: Code: +0200) System clock synchronized: no NTP service: active RTC in local TZ: no It says the NTP service is active I can also see that with timedatectl show-timesync it it looking at the (supposedly) correct server with the debian ntp servers as a fallback. I am running Ubuntu 20. At this point, you learn to view the system time, change time zones, work with ntpd and switch to timesyncd on Ubuntu 22. com/questions/79112/ (which could be By using timedatectl, an admin can control the timezone, how the system clock should relate to the hwclock and whether permanent synchronisation should be enabled. 200). chrony performs well in a wide range of conditions, including intermittent network connections, heavily congested networks, changing temperatures (ordinary computer clocks are sensitive to temperature), and systems that do not run continuously, or run on a virtual machine. And that, for some reason, my Thunderbird and my browsers are using UTC, which causes my emails to appear to be sent from the future. NTP Service: Whether the computer's NTP service is active. Now your system clock will synchronize with Internet time servers. > timedatectl status Local time: Thu 2019-09-05 18:37:49 EDT Universal time: Thu 2019-09-05 22:37:49 UTC RTC time: n/a Time zone: America/New_York (EDT, $ timedatectl Local time: Wed 2024-01-03 20:34:52 HKT Universal time: Wed 2024-01-03 12:34:52 UTC RTC time: n/a Time zone: Asia/Hong_Kong (HKT, +0800) System clock synchronized: yes NTP service: active RTC in local TZ: no (HKT, +0800) System clock synchronized: yes NTP service: active RTC in local TZ: no. By default Though I would like to know what is causing this "System clock synchronized: no". Typical accuracy between two machines synchronized over the Internet is within a few milliseconds, The System clock synchronized: yes and NTP service: active lines confirm that the system clock has synchronized with an NTP server. If your system clock is not synchronized, it can cause several issues. It also provides us with the status of some of the timedatectl command’s features, such as time synchronization status. After wake from sleep: System clock synchronized: no $ timedatectl status Local time: Do 2024-08-08 15:26:57 CEST Universal time: Do 2024-08-08 13:26:57 UTC RTC time: Do 2024-08-08 13:26:58 Time zone: Europe/Busingen (CEST, +0200) System clock synchronized: no NTP service Now the system clock is synchronized : $ timedatectl Local time: Fri 2022-08-26 11:08:05 CEST Universal time: Fri 2022-08-26 09:08:05 UTC RTC time: Fri 2022-08-26 09:08:05 Time zone: Europe/Paris (CEST, +0200) System clock synchronized: yes NTP service: n/a RTC in local TZ: no The timedatectl shows: Local time: Tue 2022-01-18 11:52:05 UTC Universal time: Tue 2022-01-18 11:52:05 UTC RTC time: n/a Time zone: Etc/UTC (UTC, +0000) System clock synchronized: no NTP service: active RTC in local TZ: no The systemctl status systemd-timesyncd shows: System clock synchronized: no to System clock synchronized: yes an not the line: NTP service: no (to yes or active) the timedatectl status: NTP synchronized: no here stay always, and with systemctl status systemd-timesyncd we get ""Synchronized to time server 172. " System clock synchronized: yes indicates that the time has been successfully synchronized, and NTP service: active implies timesyncd is up and running. I already tried sudo timedatectl set-ntp on but this only activates the NTP service and this was already running. Use systemd-firstboot(1) to initialize the system time zone for mounted (but not booted) system images. I tried running the following commands, but it's still not syncing. $ sudo timedatectl set-ntp on --adjust-system-clock ¶. timedatectl says “System clock synchronized” is “yes” and local and universal time are both UTC. A server synchronized to a stratum n server runs at stratum n + 1. Regression: 1. If you want to use chrony: If you require a one-shot sync use: $ chronyd -q Run, timedatectl status to check that: System clock synchronized: yes NTP service: active RTC in local TZ: no Note: If you are not dual booting (with Windows) you should set the hardware clock to UTC (i. --monitor ¶. timedatectl 是一個 Ubuntu Linux 預設的系統時間管理工具，支援網路校時與手動校時。 直接執行該指令，可以顯示目前的設定狀態： # 顯示目前狀態 timedatectl Local time: Mon 2020-04-06 18:11:32 CST Universal time: Mon Description¶. The hardware clock (RTC) is a separate clock that keeps time even when the system is off. So, what can I do to get the system clock synchronized? My current output: Timedatectl System Clock Synchronized No: How to Fix If your system clock is not synchronized, you may experience problems with time-sensitive applications, such as security software or online banking. may be used to query and change the system clock and its settings. 04). timedatectl may be used to query and change the system clock and its settings, and enable or disable time synchronization services. 04. Fortunately, Ubuntu 20. The NTP service is active. service active: If the clock is out-of-sync, you would see "System clock synchronized: no" as shown in the below screenshot. Manually setting the hardware clock Again timedatectl reports: "System clock synchronized: no" Last update is Today according to "timedatectl show-timesync --all" NTPMessage={ Leap=0, Version=4, Mode=4, Stratum=2, Precision=-24, RootDelay=141 In this tutorial, you will learn the basics of using the timedatectl command to manage your system’s clock and time zone settings quickly. See man timedatectl How to set time timezone and synchronize system clock using timedatectl command - Do you know how to set Time, Timezone from Linux Command Line? If not, then the timedatectl Several good answers lie below, however they won't work if your corporate firewall blocks the NTP time sync port. Added in version 195. If timesync-status is invoked and this option is passed, then timedatectl monitors the status of systemd So, we need to set up time-synchronization systems on the network. timesyncd itself is a normal service, so you can check its status in more detail using: To get all the available time zones, you can use the following timedatectl command: sudo timedatectl list-timezones. Chrony is often preferred for modern systems because it’s faster and more efficient, but NTP is still widely used. 9. On most Linux distributions, you can use NTP or Chrony to sync your system’s clock. RTC in local TZ: Whether the real-time clock is using the 图中显示NTP(System clock synchronized: no)没有同步。 命令：timedatectl set-time "时间"（注:修改系统时间必须关闭chronyd服务；local stratum 10 指即使server指令中时间服务器不可用 也允许将本地时间作为标准 All of these are running the default Pi OS. For more information on how to change the system time zone under # timedatectl outputs. Specify a hostname, or a username and hostname separated by "@", to connect to. If set-local-rtc is invoked and this option is passed, the system clock is synchronized from the RTC again, taking the new setting into account. After this, the output of timedatectl should say yes for synchronization, and if you run systemctl status systemd-timesyncd. Output. service (8). Linux的timedatectl —— 关闭或开启时间同步 :24:40 UTC RTC time: 日 2021-04-18 10:24:37 Time zone: Asia/Shanghai (CST, +0800) System clock synchronized: no Since Ubuntu 16. If I enable NTP sync then my local and universal dates get set to the year 2058. --adjust-system-clock ¶. timedatectl may be used to show the current status of time synchronization services, for example systemd . Ubuntu 18. It doesn't support the protocol which ntpstat uses to query the state of ntpd. One issue I encountered was that my system logs were displaying an incorrect date timedatectl list-timezones | grep US timedatectl set-timezone US/Eastern //changed time zone date timedatectl status //System clock synchronized: no systemctl status systemd-timesyncd //it was showing Initiating comms to NTP. You might need to activate time synchronization using: $ sudo timedatectl set-ntp on. Conclusion. If timesync-status is invoked and this option is passed, then timedatectl monitors the status of systemd “System clock synchronized: yes” means that the time on Ubuntu 22. How to Change timezone on Linux using System clock synchronized: yes ##如果和远程NTP服务器成功同步，显示为yes systemd-timesyncd. , RTC in local TZ: no in the above output), using the command timedatectl set-local-rtc 0 --adjust-system-clock. Check status of timesyncd ¶. The Timedatectl Command. To set time only, we can use a set-time switch along with the format of time in HH:MM:SS(Hour, Minute, and Seconds). Again, you need to be the root user or use sudo. Local time: Wed 2019-07-31 14:22:15 EDT Universal time: Wed 2019-07-31 18:22:15 UTC RTC time: n/a --adjust-system-clock If set-local-rtc is invoked and this option is passed, the system clock is synchronized from the RTC again, taking the new setting into account. service active: yes ##NTP时间同步是否开启，yes表示是，systemd-timesyncd服务为活动也就是开启了NTP时间同步 RTC in local TZ: no-----如上所示，timedatectl 命令显示本地时间、世界时、时区以及 Two clocks are present on systems: a hardware clock and a system clock which are also detailed in this article. --adjust-system-clock If set-local-rtc is invoked and this option is passed the system clock is synchronized from the RTC again, taking the new setting into account. timedatectl 時間管理工具. 04 timedatectl / timesyncd (which are part of systemd) replace most of ntpdate / ntp. ntpd can control the system clock using two different system functions: I want the time to sync, but it's not. Use systemd-firstboot (1) to initialize the system time zone for mounted (but not booted) system images. System clock synchronized: no The timedatectl manpage gives full information, but to enable the synchronisation service run sudo timedatectl set-ntp true. 3 min read · Jun 11, 2023--Listen. [rounak@archissexy ~]$ timedatectl status Local time: Fri 2022-04-01 17:45:57 IST Universal time: Fri 2022-04-01 12:15:57 UTC RTC time: Fri 2022-04-01 12:15:57 Time zone: Asia/Kolkata (IST, +0530) System clock synchronized: no NTP service: inactive RTC in local TZ: no [rounak@archissexy ~]$ Asia/Kolkata (IST, +0530) System clock System clock synchronized: yes indicates that the time has been successfully synced, and systemd-timesyncd. 1. 8. The timedatectl shows: Local time: Tue 2022-01-18 11:52:05 UTC Universal time: Tue 2022-01-18 11:52:05 UTC RTC time: n/a Time zone: Etc/UTC (UTC, +0000) System clock synchronized: no NTP service: active RTC in local TZ: no The systemctl status systemd-timesyncd shows: The timedatectl command is part of the systemd suite of tools and provides a convenient way to view and modify these settings. Correct if I was in Europe/Berlin, but I am not. Keep accurate time of the system clock, see #Time synchronization. Still, I don't understand why NTP $ timedatectl Local time: jue 2022-09-22 06:45:34 CEST Universal time: jue 2022-09-22 06:45:34 UTC RTC time: n/a Time zone: Europe/Madrid (CEST, +0200) System clock synchronized: no NTP service: active RTC in local TZ: no System clock synchronized: no NTP service: active RTC in local TZ: no System clock is not synchronized, although there's Using timedatectl to Sync your Raspberry Pi’s Time. When your Raspberry Pi syncs the time from a networked server, it typically retrieves Next, we need to check whether the system already uses NTP to synchronize our system clock over the network: timedatectl | grep "NTP synchronized" Afterward, we enabled the synchronization of our system time with NTP using the timedatectl set-ntp yes command. The entry yes suggests the system clock is synchronized. System clock The following is an example output of the timedatectl command on a system that does not use NTP to synchronize the system clock with a remote server: ~]$ timedatectl Local time: Mon 2016-09-16 19:30:24 CEST Universal time: Mon 2016-09-16 17:30:24 UTC Timezone: Europe/Prague (CEST, +0200) NTP enabled: no NTP synchronized: no RTC in local TZ: no timedatectl may be used to query and change the system clock and its settings, and enable or disable time synchronization services. timedatectl command output Introduction. I have an application on a Linux system (Ubuntu Server) that needs to know whether the current system clock has been synchronized to a NTP server. To display the current time on your system, check whether the system clock is synchronized and whether NTP is indeed active, run the timedatectl command: # timedatectl Check the Current Server Time. conf file is the default. You can also configure the real-time clock of your system. 6p5-29 In this case, “System clock synchronized: no” indicates that the system is not currently synchronized, which could lead to clock drift. Share. service If timesyncd isn’t active, turn it on with timedatectl: sudo timedatectl set-ntp on Run timedatectl again to confirm the network time status. While I could check timedatectl's output for System clock synchronized: yes, this seems very brittle, especially since timedatectl's human readable output might change in the future. Output should be: System clock synchronized: yes NTP service: active Share. The timedatectl program will print "NTP synchronized: yes" only if this flag is cleared (set to zero). timedatectl showed that it was not synchronized: kfank@kfank-VirtualBox:~/tmp$ timedatectl Local time: Fri 2020-06-05 11:58:44 PDT Universal time: Fri 2020-06-05 18:58:44 UTC RTC time: Fri 2020-06-05 18:58:45 Time zone: America/Los_Angeles (PDT, -0700) System clock synchronized: no systemd The timedatectl command reports that NTP is in use when either chronyd or systemd-timesyncd is enabled and running. (GMT, +0000) System clock synchronized: yes NTP service: inactive RTC in local TZ: no Setting the Timezone. However, what I thought would be an indicator that time has synchronized, the timedatectl status, that does not appear to accurately tell me that time has synched. See man timedatectl for more details. Step 2: Install NTP or Chrony. x86_64 0:4. Follow edited Nov 16, 2017 at 5:01. Description¶. It does not recognize the ntpd service, which is designed to be both an NTP client and server, and now that we have dedicated NTP client software, is no System clock synchronized: no. Both of these are lightweight NTP clients suitable for most servers and workstations. 9. timedatectl doesn't show up the NTP service properly 2. This guide will show you how to fix the issue in Ubuntu and other Linux distributions. See Time Synchronization. Indicates whether the system clock is synchronized with an external time source. And to be clear, the system time does sync. Otherwise, start the service with timedatectl. How To Sync The Ubuntu System Clock? (GUI, TimeDateCtl & NTP). The System clock synchronized is a direct interpretation of the appropriate time_status bits Ubuntu’s system clock is already synchronized by default with an Internet server using the time zone set during installation, there is nothing else to configure. You may get the below error when setting the date as shown above: 7. Hope you enjoy it. Device up for 30 minutes and timedatectl says the following: root@67e3989:~# timedatectl Local time: Sun 2020-03-29 05:37:19 UTC Universal time: Sun 2020-03-29 05:37:19 UTC RTC time: Sun 2020-03-29 文章浏览阅读1. Code: Select all 1. The real-time clocks of computers are as susceptible to drift as any other timepiece. Whereas the system clock is maintained by the OS. 04 Desktop - date and time synchronization issue. 今回は、時刻を表示／設定する「timedatectl」コマンドです。 --adjust-system-clock: RTCの設定を変更したとき、それに合わせてシステムクロックを調整する NTP synchronized: NTPで同期しているかどうか（yes／no） [status] Default Show current settings of the system clock and RTC † , including whether network time synchronization is enabled, by systemd-timesyncd. It is assigned a number starting with zero for the reference clock at the top. Which is kind of crucial or this to work. Time is kept accurate by synchronizing with a reliable time 介紹如何在 Ubuntu Linux 中使用 timedatectl 透過網路 NTP 或手動校正系統時間。. in the output of timedatectl. 04 and using timedatectl with timesyncd. It may take a minute for the actual sync to happen, but eventually both Network The kernel maintains an "unsynchronized" flag for the system clock. If you see these, you can proceed to the next section. Andrew Tapia # systemctl enable ntpd. After that, we opened the main chrony configuration file, /etc/chrony. # timedatectl reports System clock synchronized: no even when NTP service: active and # systemctl status chronyd shows active (running), and the logs therein don't show anything like an error; I see for example "Using right/UTC timezone to obtain leap second data". -H, --host= Execute the operation remotely. --adjust-system-clock If set-local-rtc is invoked and this option is passed, the system clock is synchronized from the RTC again, taking the new setting into account. 2. 04 has been successfully synced, and the “NTP service: active” means that the timesyncd is enabled and running. you can revert this back to UTC by using. 21. During Linux boot time, the hardware clock updates the system clock. service in the line starting with Loaded: it should say enabled somewhere, indicating the synchronization timedatectl may be used to query and change the system clock and its settings, and enable or disable time synchronization services. You will start by understanding the basic usage of the timedatectl command, then learn how to change the time zone and configure NTP settings to keep your system clock synchronized. Note: If it still not works, run the following command to enable the time synchronization: $ sudo timedatectl set-ntp true. timedatectl set-local-rtc 1 It basically tells arch to use local time instead of UTC. Save and exit and then restart the NTP service: sudo timedatectl set-ntp off and then sudo timedatectl set-ntp on. See more From man timedatectl, NTP-sync needs to be enabled: sudo timedatectl set-ntp true Then timedatectl should do the rest automatically (see Redbob's reply). . Ubuntuでは、ntpdateではなくtimedatectlを使いましょう。この記事では、時刻合わせにtimedatectlを利用する理由とその利用方法を解説しています。 Asia/Tokyo (JST, +0900) System clock synchronized: yes NTP service: active RTC in local TZ: no 「NTP service: active」 inactiveからactiveに変わり timedatectl may be used to query and change the system clock and its settings, and enable or disable time synchronization services. however I noticed that the clocks on all of them cannot be synchronized with an NTP server. This is a RHEL 8 system, the /etc/chrony. The first task would be to figure out the actual name of the synchronization service. I ran the following to disable NTP synchronization: timedatectl set-ntp 0 But I still wasn't able to change the time, as below: Prevent clock from advancing to a system time after Ubuntu Server build time. jyjichb klxpt sjrs arzaa acbpbwl jvxcb cahn yteznn weou gtiofl