Debian10 NTPD conflict with systemd-timesyncd

Hi NTP Community, this is my first post. I’m a NTP server operator for quite some time now. Running Ubuntu, haven’t needed to join the forum before today.

I’m trying to add a Debian10 server to the pool but i’m having a problem setting up ntp.

There seems to be a conflict between ntpd and systemd-timesyncd.

Here’s some lines, do you have an idea how I could fix this?

# systemctl status ntp.service
● ntp.service - Network Time Service
   Loaded: loaded (/lib/systemd/system/ntp.service; enabled; vendor preset: enab
   Active: active (running) since Tue 2020-01-21 15:59:12 EST; 1min 43s ago
     Docs: man:ntpd(8)
  Process: 3147 ExecStart=/usr/lib/ntp/ntp-systemd-wrapper (code=exited, status=
 Main PID: 3153 (ntpd)
    Tasks: 2 (limit: 4671)
   Memory: 1.6M
   CGroup: /system.slice/ntp.service
           └─3153 /usr/sbin/ntpd -p /var/run/ -g -c /run/ntp.conf.dhcp -

Jan 21 15:59:12  ntpd[3153]: Listen and drop on 0 v6wildcard [::]:123
Jan 21 15:59:12  ntpd[3153]: Listen and drop on 1 v4wildcard
Jan 21 15:59:12  ntpd[3153]: Listen normally on 2 lo
Jan 21 15:59:12  ntpd[3153]: Listen normally on 3 ens2
Jan 21 15:59:12  ntpd[3153]: Listen normally on 4 lo [::1]:123
Jan 21 15:59:12  ntpd[3153]: Listen normally on 5 ens2 [2001:bc8:608:
Jan 21 15:59:12  ntpd[3153]: Listen normally on 6 ens2 [fe80::dc1c:94
Jan 21 15:59:12  ntpd[3153]: Listening on routing socket on fd #23 fo
Jan 21 15:59:12  ntpd[3153]: kernel reports TIME_ERROR: 0x2041: Clock
Jan 21 15:59:12  ntpd[3153]: kernel reports TIME_ERROR: 0x2041: Clock
# systemctl status systemd-timesyncd
● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; disabled; vend
  Drop-In: /lib/systemd/system/systemd-timesyncd.service.d
   Active: inactive (dead) since Tue 2020-01-21 15:56:03 EST; 13min ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 1755 (code=exited, status=0/SUCCESS)
   Status: "Shutting down..."

Jan 21 13:49:28  systemd[1]: Starting Network Time Synchronization...
Jan 21 13:49:28  systemd[1]: Started Network Time Synchronization.
Jan 21 13:49:28 systemd-timesyncd[1755]: Synchronized to time server
Jan 21 15:56:03  systemd[1]: Stopping Network Time Synchronization...
Jan 21 15:56:03  systemd[1]: systemd-timesyncd.service: Succeeded.
Jan 21 15:56:03  systemd[1]: Stopped Network Time Synchronization.
lines 1-15/15 (END)

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset  jitter
*      5 u   58   64  377    0.496   -0.248   2.158       .INIT.          16 u    -  256    0    0.000    0.000   0.000
#  systemctl show -p After,Before,Wants,WantedBy,Requres,RequiredBy,Conflicts,ConflictedBy ntp.service systemd-timesyncd.service
RequiredBy= systemd-timesyncd.service
ConflictedBy= system.slice systemd-journald.socket basic.t
After=systemd-journald.socket systemd-tmpfiles-setup.service systemd-remount-fs.
#  ps aux | grep "time\|ntp"
ntp       3153  1.1  0.1  77052  4292 ?        Ssl  15:59   0:09 /usr/sbin/ntpd -p /var/run/ -g -c /run/ntp.conf.dhcp -u 107:113
root      3262  0.0  0.0   6212   884 pts/1    S+   16:12   0:00 grep time\|ntp

Here’s my NTP.conf (/etc/ntp.conf)

root@WWW:~# nano /etc/ntp.conf
  GNU nano 2.9.3                                                                                                   /etc/ntp.conf

# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

driftfile /var/lib/ntp/ntp.drift

# Leap seconds definition provided by tzdata
leapfile /usr/share/zoneinfo/leap-seconds.list

# Enable this if you want statistics to be logged.
#statsdir /var/log/ntpstats/

statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable

# Specify one or more NTP servers.

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See for
# more information.
server iburst
server iburst
(can't show all five servers address because there's a rule on this forum blocking me at 2 url by post)

# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details.  The web page <>
# might also be helpful.
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.

# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery limited
restrict -6 default kod notrap nomodify nopeer noquery limited

# Local users may interrogate the ntp server more closely.
restrict ::1

# Needed for adding pool entries
restrict source notrap nomodify noquery

# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict mask notrust

# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)

# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines.  Please do this only if you trust everybody on the network!
#disable auth

Don’t run “systemd-timesyncd” as it is only a SNTP service…

Debian 10 you also have your choice of running ntpsec or chrony, either of those would probably be more preferable to the standard NTPD package.


Hi littlejason99,
Thank you for your advice.
I just installed ntpsec which is as easy as ntpd to configure and it is now working like a charm.
Best regards,

1 Like

systemd-timesyncd does not run if you have another NTP daemon installed (see systemctl cat systemd-timesyncd), so there is no conflict there.

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