CLI - NTP - 편집 역사

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Shin: Shin님이 CLI - NTP and datetime 문서를 CLI - NTP 문서로 이동했습니다

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Shin님이 CLI - NTP and datetime 문서를 CLI - NTP 문서로 이동했습니다

Shin: 새 문서: FORCETOC === ntp === The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networ...

2021-05-18T04:37:59Z

새 문서: __FORCETOC__ === ntp === The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networ...

새 문서

__FORCETOC__
=== ntp ===
The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.<ref>https://en.wikipedia.org/wiki/Network_Time_Protocol</ref>
{{note|Note that the system has already an NTP server that is "ntp.ubuntu.com".}}
==== Verifying NTP ====
To verify the NTP servers, enter <code>show ntp server</code> in the user mode. If none of the servers exists, it indicates that there are no NTP servers except for the default.
LYSH@MyHostName# show ntp servers
To show the status of the Time synchronization, <code>show ntp status</code> in the user mode. It shows the status of, when, and where the time was synchronized.
<pre>
LYSH@MyHostName# show ntp status
● systemd-timesyncd.service - Network Time Synchronization
Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-04-27 13:12:30 KST; 10s ago
Docs: man:systemd-timesyncd.service(8)
Main PID: 18992 (systemd-timesyn)
Status: "Connecting to time server [2001:67c:1560:8003::c8]:123 (ntp.ubuntu.com)."
Tasks: 2 (limit: 9387)
Memory: 1.6M
CGroup: /system.slice/systemd-timesyncd.service
└─18992 /lib/systemd/systemd-timesyncd
</pre>
You can also verify the Time synchronization by using the <code>show datetime</code> commmand.
<pre>
LYSH@MyHostName# show datetime
Local time: Tue 2021-04-27 13:32:46 KST
Universal time: Tue 2021-04-27 04:32:46 UTC
RTC time: Tue 2021-04-27 04:32:46
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
</pre>

==== add / delete ====
You can configure the NTP servers. If you add an NTP server, the system synchronizes the time using added NTP server. If the Time synchronization failed from a server, the system tries to the next server.
<pre>
LYSH@MyHostName# configure
configure# ntp add asia.pool.ntp.org
configure# exit
LYSH@MyHostName# show ntp servers
NTP Servers : asia.pool.ntp.org
</pre>

You can see the status of the time synchronization to a time server by the <code>show ntp status</code> command. If the "Status" shows "Idle", it indicates the system couldn't synchronize to one of the NTP servers.
<pre>
LYSH@MyHostName# show ntp status
● systemd-timesyncd.service - Network Time Synchronization
Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-04-27 13:10:36 KST; 12s ago
Docs: man:systemd-timesyncd.service(8)
Main PID: 18321 (systemd-timesyn)
Status: "Initial synchronization to time server 157.119.108.165:123 (asia.pool.ntp.org)."
Tasks: 2 (limit: 9387)
Memory: 1.6M
CGroup: /system.slice/systemd-timesyncd.service
└─18321 /lib/systemd/systemd-timesyncd
</pre>

To remove one of the NTP servers, enter the <code>ntp delete {ntp-server-name}</code> in the configuration mode.
<pre>
LYSH@MyHostName# configure
configure# ntp delete asia.pool.ntp.org
configure# exit
</pre>

==== enable / disable ====
You can disable the System clock synchronizing using the NTP server.
<pre>
LYSH@MyHostName# configure
configure# ntp disable
Local time: Tue 2021-04-27 10:26:03 KST
Universal time: Tue 2021-04-27 01:26:03 UTC
RTC time: Tue 2021-04-27 01:26:03
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: no
NTP service: inactive
RTC in local TZ: no
</pre>

You can also enable it. The status of the "System clock synchronized" may show "inactive" for a while after enabling the NTP and the status will be changed to "active" in few seconds.
<pre>
LYSH@MyHostName# configure
configure# ntp enable
Local time: Tue 2021-04-27 10:26:03 KST
Universal time: Tue 2021-04-27 01:26:03 UTC
RTC time: Tue 2021-04-27 01:26:03
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: active
NTP service: active
RTC in local TZ: no
</pre>

=== datetime ===
To show the system time and date, enter the <code>show datetime</code> command.
<pre>
LYSH@MyHostName# show datetime
Local time: Tue 2021-04-27 13:32:46 KST
Universal time: Tue 2021-04-27 04:32:46 UTC
RTC time: Tue 2021-04-27 04:32:46
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
</pre>

To change the system time and date, enter the <code>datetime {format}</code>. The format must be 'yyyy-mm-dd hh24:mi:ss'.<br>
Note that if you manually change the system time and date while the NTP is enabled, you encounter the "''Failed to set time: Automatic time synchronization is enabled''" error. Therefore you need to disable the NTP before configuring the system time and date manually.
LYSH@MyHostName# configure
configure# datetime 2021-04-27 13:00:00
Local time: Tue 2021-04-27 13:00:00:49 KST
Universal time: Tue 2021-04-27 04:00:00 UTC
RTC time: Tue 2021-04-27 04:00:00
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no

=== References ===

@@ 1번째 줄: / 1번째 줄: @@
 __FORCETOC__
 === ntp ===
-NTP(Network Time Protocol)은 장치의 시간을 서버를 통해 동기화 하기위한 기능입니다.<ref>https://en.wikipedia.org/wiki/Network_Time_Protocol</ref>
+NTP(Network Time Protocol)은 장치의 시간을 NTP 서버를 통해 동기화 하기위한 기능입니다.<ref>https://en.wikipedia.org/wiki/Network_Time_Protocol</ref>
 {{note|본 시스템은 이미 "ntp.ubuntu.com" NTP 서버 주소를 포함하고 있으므로 별도의 NTP 서버를 지정하지 않으면 이 서버를 통해 시간이 동기화 됩니다. 새로운 NTP 서버가 등록되면 등로된 NTP 서버로 부터 먼저 시간 동기화를 시도하고 실패시 기본 서버로부터 확인합니다.}}
 ==== NTP 확인 ====

@@ 38번째 줄: / 38번째 줄: @@
 <pre>
 LYSH@MyHostName# configure
-configure# ntp add asia.pool.ntp.org
+LYSH@MyHostName(config)# ntp add asia.pool.ntp.org
-configure# exit
+LYSH@MyHostName(config)# exit
 LYSH@MyHostName# show ntp servers
 NTP Servers                   : asia.pool.ntp.org
@@ 63번째 줄: / 63번째 줄: @@
 <pre>
 LYSH@MyHostName# configure
-configure# ntp delete asia.pool.ntp.org
+LYSH@MyHostName(config)# ntp delete asia.pool.ntp.org
-configure# exit
+LYSH@MyHostName(config)# exit
 </pre>
@@ 71번째 줄: / 71번째 줄: @@
 <pre>
 LYSH@MyHostName# configure
-configure# ntp disable
+LYSH@MyHostName(config)# ntp disable
 Local time: Tue 2021-04-27 10:26:03 KST
             Universal time: Tue 2021-04-27 01:26:03 UTC
@@ 82번째 줄: / 82번째 줄: @@
 LYSH@MyHostName# configure
-configure# ntp enable
+LYSH@MyHostName(config)# ntp enable
    Local time: Tue 2021-04-27 10:26:03 KST
             Universal time: Tue 2021-04-27 01:26:03 UTC

@@ 1번째 줄: / 1번째 줄: @@
 __FORCETOC__
 === ntp ===
-The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.<ref>https://en.wikipedia.org/wiki/Network_Time_Protocol</ref>
+NTP(Network Time Protocol)은 장치의 시간을 서버를 통해 동기화 하기위한 기능입니다.<ref>https://en.wikipedia.org/wiki/Network_Time_Protocol</ref>
-{{note|Note that the system has already an NTP server that is "ntp.ubuntu.com".}}
+{{note|본 시스템은 이미 "ntp.ubuntu.com" NTP 서버 주소를 포함하고 있으므로 별도의 NTP 서버를 지정하지 않으면 이 서버를 통해 시간이 동기화 됩니다. 새로운 NTP 서버가 등록되면 등로된 NTP 서버로 부터 먼저 시간 동기화를 시도하고 실패시 기본 서버로부터 확인합니다.}}
-==== Verifying NTP ====
+==== NTP 확인 ====
-To verify the NTP servers, enter <code>show ntp server</code> in the user mode. If none of the servers exists, it indicates that there are no NTP servers except for the default.
+user mode에서 <code>show ntp server</code> 명령어를 통해 확인 할 수 있으며 아무런 목록이 나타나지 않는다면 기본 NTP 서버(ntp.ubuntu.com)이외에 추가로 등록된 NTP 서버가 없음을 의미합니다.
   LYSH@MyHostName# show ntp servers
-To show the status of the Time synchronization, <code>show ntp status</code> in the user mode. It shows the status of, when, and where the time was synchronized.
 <pre>
 LYSH@MyHostName# show ntp status
@@ 20번째 줄: / 21번째 줄: @@
               └─18992 /lib/systemd/systemd-timesyncd
 </pre>
-You can also verify the Time synchronization by using the <code>show datetime</code> commmand.
 <pre>
 LYSH@MyHostName# show datetime
@@ 32번째 줄: / 34번째 줄: @@
 </pre>
-==== add / delete ====
+==== 추가/삭제 ====
-You can configure the NTP servers. If you add an NTP server, the system synchronizes the time using added NTP server. If the Time synchronization failed from a server, the system tries to the next server.
+NTP 서버를 추가/삭제 하려면 configuration mode에서 <code>ntp</code> 명령을 이용하세요. 새로운 NTP 서버가 등록되면 등로된 NTP 서버로 부터 먼저 시간 동기화를 시도합니다.
 <pre>
 LYSH@MyHostName# configure
@@ 42번째 줄: / 44번째 줄: @@
 </pre>
-You can see the status of the time synchronization to a time server by the <code>show ntp status</code> command. If the "Status" shows "Idle", it indicates the system couldn't synchronize to one of the NTP servers.
+새로운 서버를 등록 후 user mode에서 <code>show ntp status</code> 명령을 실행하면 상태(Status)가 "Idle"로 표시될 수 있는데 이는 아직 새로운 서버로 부터 시간이 동기화되지 않았음을 나타내는데 일정 시간 상태(Status)가 "Idle"로 지속되면 NTP 서버와의 통신을 확인하세요.
 <pre>
 LYSH@MyHostName# show ntp status
-● systemd-timesyncd.service - Network Time Synchronization
+ systemd-timesyncd.service - Network Time Synchronization
       Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
-      Active: active (running) since Tue 2021-04-27 13:10:36 KST; 12s ago
+      Active: active (running) since Tue 2021-05-18 14:01:39 KST; 18s ago
         Docs: man:systemd-timesyncd.service(8)
-    Main PID: 18321 (systemd-timesyn)
+    Main PID: 1050237 (systemd-timesyn)
-      Status: "Initial synchronization to time server 157.119.108.165:123 (asia.pool.ntp.org)."
+      Status: "Idle."
        Tasks: 2 (limit: 9387)
-      Memory: 1.6M
+      Memory: 1.3M
       CGroup: /system.slice/systemd-timesyncd.service
-              └─18321 /lib/systemd/systemd-timesyncd
+              └─1050237 /lib/systemd/systemd-timesyncd
 </pre>
-To remove one of the NTP servers, enter the <code>ntp delete {ntp-server-name}</code> in the configuration mode.
+NTP 서버를 삭제하려면 <code>ntp delete {ntp-server-name}</code>명령을 사용하세요.
 <pre>
 LYSH@MyHostName# configure
@@ 65번째 줄: / 68번째 줄: @@
 ==== enable / disable ====
-You can disable the System clock synchronizing using the NTP server.
+NTP 사용 상태를 변경 할 수 있습니다.
 <pre>
 LYSH@MyHostName# configure
@@ 76번째 줄: / 79번째 줄: @@
                NTP service: inactive
            RTC in local TZ: no
-You can also enable it. The status of the "System clock synchronized" may show "inactive" for a while after enabling the NTP and the status will be changed to "active" in few seconds.
 LYSH@MyHostName# configure
 configure# ntp enable

@@ 90번째 줄: / 90번째 줄: @@
            RTC in local TZ: no
 </pre>
 === References ===

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