在 Ubuntu server 22.04 設定 NTP server 校時

 

在 Ubuntu server 22.04 設定 NTP server 校時

工程絲
Feb 16, 2023

使用 systemd-timesyncd，在 ubuntu server22.04 上指定特定的 NTP server 來自動校時

1. 安裝 systemd-timesyncd

apt install systemd-timesyncd
timedatectl set-ntp true
sudo systemctl start systemd-timesyncd

2. 檢查安裝

systemctl status systemd-timesyncd

結果範例

● systemd-timesyncd.service - Network Time Synchronization
     Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2023-02-16 11:06:08 CST; 16min ago
       Docs: man:systemd-timesyncd.service(8)
   Main PID: 12832 (systemd-timesyn)
     Status: "Idle."
      Tasks: 2 (limit: 19067)
     Memory: 1.2M
        CPU: 52ms
     CGroup: /system.slice/systemd-timesyncd.service
             └─12832 /lib/systemd/systemd-timesyncd

3. 設定：編輯 /etc/systemd/timesyncd.conf

sudo vi /etc/systemd/timesyncd.conf

內容

[Time]
NTP=ntp.server.you.want
#FallbackNTP=ntp.ubuntu.com
#RootDistanceMaxSec=5
#PollIntervalMinSec=32
#PollIntervalMaxSec=2048

4. 重啟服務，套用修改

sudo systemctl restart systemd-timesyncd

5. 驗證設定

timedatectl show-timesync --all

結果範例

LinkNTPServers=
SystemNTPServers=ntp.server.you.want
FallbackNTPServers=ntp.ubuntu.com
ServerName=ntp.server.you.want
ServerAddress=ntp.server.you.want
RootDistanceMaxUSec=5s
PollIntervalMinUSec=32s
PollIntervalMaxUSec=34min 8s
PollIntervalUSec=34min 8s
Frequency=0

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