ntpcl

A simple NTP client to fetch and optionally set system time

Default Run

By just running the app you get the NTP server time, the local time and many details for the server and the time.

./ntpcl

NTP   : 2024-06-26 23:43:34.038635381 +0300 EEST m=+0.097589882
Local : 2024-06-26 23:43:34.041431512 +0300 EEST m=+0.100386014
NTP server: europe.pool.ntp.org (80.89.32.122)
Stratum: 2
Precision: 953
Root Delay: 21.896362ms
Root Dispersion: 32.653809ms
Round-trip delay: 82.871417ms
Clock offset: -2.79595ms
Poll interval: 8s

Usage

Set Time to NTP Server

./ntpcl --set

NTP   : 2024-06-26 23:44:48.532935783 +0300 EEST m=+0.095169689
Local : 2024-06-26 23:44:48.535802442 +0300 EEST m=+0.098036349
NTP server: europe.pool.ntp.org (131.111.8.63)
Stratum: 2
Precision: 953
Root Delay: 21.896362ms
Root Dispersion: 33.7677ms
Round-trip delay: 84.05751ms
Clock offset: -2.866526ms
Poll interval: 8s
System time updated successfully
New local system time: 2024-06-26 23:44:48.536349515 +0300 EEST m=+0.179418170
Time difference after setting: 84.248481ms

Set Time to Custom NTP Server

./ntpcl --ntp-server europe.pool.ntp.org --set

NTP   : 2024-06-26 23:45:34.414975883 +0300 EEST m=+0.137681722
Local : 2024-06-26 23:45:34.33176466 +0300 EEST m=+0.054470499
NTP server: europe.pool.ntp.org (158.101.213.248)
Stratum: 2
Precision: 953
Root Delay: 350.952µs
Root Dispersion: 930.786µs
Round-trip delay: 38.742872ms
Clock offset: 83.211354ms
Poll interval: 1s
System time updated successfully
New local system time: 2024-06-26 23:45:34.41829209 +0300 EEST m=+0.107186288
Time difference after setting: -30.495434ms

High Accuracy Mode

./ntpcl --ntp-server europe.pool.ntp.org --high-accuracy --set

NTP   : 2024-06-26 23:46:37.747730162 +0300 EEST m=+0.116907113
Local : 2024-06-26 23:46:37.681243144 +0300 EEST m=+0.050420097
NTP server: europe.pool.ntp.org (49.12.125.53)
Stratum: 2
Precision: 953
Root Delay: 350.952µs
Root Dispersion: 991.821µs
Round-trip delay: 39.303808ms
Clock offset: 66.487121ms
Poll interval: 1s
High accuracy mode enabled. Gathering multiple samples...
Average offset: 64.595344ms
Adjusted NTP time: 2024-06-26 23:46:42.212707382 +0300 EEST m=+4.581884334
System time updated successfully
New local system time: 2024-06-26 23:46:42.216784924 +0300 EEST m=+4.577605048
Time difference after setting: -4.279286ms

Web Time

./ntpcl --http-server https://google.com

Querying time from HTTP server: https://google.com
Status Code: 200
WEB   : 2024-06-27 14:53:10 +0000 GMT
RTT   : 1.122863309s
Local : 2024-06-27 17:53:11.276849997 +0300 EEST m=+1.123107442
Time difference: -1.276849997s
RTT   : 1.122863309s
Retrieved from HTTP server: https://google.co