NTP Installation and Configuration

Install

Install the ntp package sudo apt install ntp

Check if the service is running sudo systemctl status ntp.service or service ntp status

● ntp.service - LSB: Start NTP daemon
   Loaded: loaded (/etc/init.d/ntp; bad; vendor preset: enabled)
   Active: active (running) since Thu 2019-10-10 12:42:13 WEST; 11s ago
     Docs: man:systemd-sysv-generator(8)
   CGroup: /system.slice/ntp.service
           └─4100 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 115:120

Configure

Open the configuration file sudo vi /etc/ntp.conf. Comment any default pool and add the following

server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
server 3.pool.ntp.org

restart the service sudo systemctl restart ntp.service or service ntp restart

Test

Run ntpq -p

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 time.videxio.ne 131.188.3.223    2 u    1   64    1    0.328    0.507   0.000
 ntp1.vmar.se    .INIT.          16 u    -   64    0    0.000    0.000   0.000
 ntp1.ds.network 85.199.214.99    2 u    1   64    1    1.666    0.663   0.000
 time.shf.uk.as4 .INIT.          16 u    -   64    0    0.000    0.000   0.000