Questions about the NTP protocol and applications that use it. NTP is an acronym for Network Time Protocol.

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0
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0answers
8 views

Bad UTC Time with datetimectl

I just installed the new release of Ubuntu Server 16.04.1 LTS. I used to sync with ntpd, and I read that now it is deprecated. I have set my server timezone to UTC, this is a required setting using ...
0
votes
2answers
589 views

How to force an immediate clock/time synchronization/ntp update in 16.04?

It seems like the documentation at the LTS server guide and and community wiki may not have been updated for 16.04 yet. A figure in in the community wiki page shows a 'synchronize now' button but I ...
0
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1answer
21 views

The NTP “ntpdc” shell command “peers” returns “localhost: timed out, nothing received”

I'm running Ubuntu MATE 16.04 (Xenial Xerus) - 64-bit "Desktop" version - in a HP laptop computer. I have a question regarding NTP (Network Time Protocol): if i run the command "ntpq -p", I then get ...
0
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0answers
9 views

how can I reduce NTPD poll frequency?

If don't configure minpoll and maxpoll in /etc/ntp.conf file. It takes 64s and 1024s respectively. I have changed my system time (forwarded to 10 mins) for NTP updating my time within minpoll maxpoll ...
0
votes
1answer
29 views

At what time intervals does ntpd update the time?

I'm running the latest ntpd. When I start ntpd my system time synchronizes with ntp server's ntp. After synchronizing I changed my system time manually using date command date -s '1997-02-22 12:00:...
0
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0answers
15 views

ntpdate is not updating system time

I have manually installed the ntp package on my Ubuntu. When I manually changes the date & time (for example, move the time forward by about 10 minutes) my ntpd is not synchronizing the correct ...
3
votes
1answer
47 views

Can you help me troubleshoot (and rectify) a time drift issue?

I'm using Ubuntu Mate 15.10 on a F.Siemens laptop. I'm facing a time drift issue that I'd need some help with. The time drifts by as much as 15 minutes in a 2-3 hour span. Forcing an update (with ...
1
vote
1answer
73 views

Setting up ntp server

I have a few Jetson-TK1 boards that do not have a real-time clock and consequently loses their time whenever it is powered off. I would like to set each one so when they power on, their clock gets set....
1
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1answer
167 views

Ubuntu NTP time wrong after reboot

Running 12.04LTS for a while now. When we reboot, the server comes on with the time 46 minutes slow. nearly every reboot. We installed ntp (apt-get install ntp) so the time does auto-correct after 4-5 ...
1
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0answers
20 views

When changing the date & time, ntp time is auto updating to the correct time

I have manually install the latest ntpd 4.2.8p6 package, not used apt-get install command. All ntp binaries have installed properly. When I set an incorrect date using the date command, my machine is ...
0
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0answers
21 views

NTP synchronisation in Ubuntu Core 10

How can i configure a proper NTP synchronization in ubuntu core 10. I am running the following version ubuntu-core 2016-05-24 10 ubuntu I tried using root@localhost:/home/...
6
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2answers
12k views

Setting up a standalone NTP server on Ubuntu

I want to setup a standalone NTP server on Ubuntu. The problem is all the tutorials i see on the internet are about how to make the server to synchronize with another time server on the internet and ...
0
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0answers
28 views

How to synch time between ubuntu laptops in a local network

I'd like to synch time on all my laptops inside my local network which use a router but it has no access to public internet so I can't use remote time servers. I would like to use a laptop to act ...
1
vote
0answers
60 views

How to use chrony to synchronize timestamp on two computers

I need to compare results which come from two different laptops. Each laptop has a different set of sensors and in order to correctly compare them I need to have the same timestamp on both laptops. ...
0
votes
1answer
40 views

issue : USB-LIVE Lubuntu ntpdate time is not getting sync

I am trying to boot from USB and sync time using "ntpdate" command from a windows PC as ntp server. OS : Lubuntu live usb when i run the ntpdate command it is getting executed and the date is set ...
0
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0answers
20 views

How to delay ntp.service start?

My laptop has Ubuntu MATE 16.04 LTS installed. I mainly use the wifi connection; however I installed UM with an ethernet connection. Now during boot up there's a delay in resolving ntp servers. After ...
0
votes
1answer
71 views

NTP without DNS

I have a box running ubuntu 10.04 x86 & it's isolated by necessity from a lot of the network. It is blocked from DNS. I'd like it to keep accurate time, so I've configured NTP with several ...
5
votes
2answers
14k views

ntpd server always in 'INIT' mode

I'm running ntpd server in my ubuntu (10.04) machine. But it is always stays in the 'INIT' state as shown below. lyra@ws07475:~$ ntpq -p remote refid st t when poll reach delay ...
0
votes
1answer
20 views

I have a cluster of computers, how do I setup ntpd so they all have nearly the same clock?

I have 4 computers, one is considered the master (direct connection to the Internet) and the others are considered slaves (for those the master adds one extra hop to any external communication.) At ...
0
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1answer
356 views

NTP failed to synchronize time

I have Ubuntu Server 16.04 running on OpenVZ (VPS hosting provider), and I have difficulties running ntp for time synchronization. I just installed ntp (apt install ntp), but when I try it, I see ...
4
votes
1answer
5k views

How to change the time server in ubuntu 12.04 LTS without installing the `ntp` package

I am on Ubuntu 12.04 LTS, in the dialog "Time and Date settings" there is a set of radio buttons labeled as "Set the time", the two options are "Manually" and "Automatically from the Internet": My ...
0
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1answer
24 views

How change Address of NTP server for nodes by shell command?

UBUNTU 16.04 MAAS 2.0.0 Beta 3 It seems the MAAS web interface doesnot update Address of NTP server for nodes in setting page? How can I change this NTP address by shell command?
1
vote
1answer
26 views

What is the prefered method to adjust network time protocol?

When adjusting [speeding up] my boot time I discovered 2 methods to adjust NTP. https://help.ubuntu.com/lts/serverguide/NTP.html suggested /etc/ntp.conf; http://www.pool.ntp.org suggested /var/lib/ntp/...
46
votes
4answers
109k views

ntpdate: no server suitable for synchronization found

My clock is off, so I would like to synchronize it using ntpdate. I tried several different NTP servers, but for some reason I always get the following error message: $ sudo ntpdate ntp.ubuntu.com 4 ...
0
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0answers
31 views

MAAS NTP Address (Time Server)

UBUNTU 16.04 MAAS 2.0.0 Beta 3 I changed NTP server, on MAAS Setting Web UI "Address of NTP server for nodes". When I am looking in nodes commission log when it itries to commision it tries to get ...
1
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3answers
132 views

How to simplify the command : four same structures?

ntpdate 110.75.186.247 >> /var/log/ntpdate.log || ntpdate 110.75.186.247 >> /var/log/ntpdate.log || ntpdate 203.123.48.218 >> /var/log/ntpdate.log|| ntpdate 103.16.199.21 >> /...
0
votes
1answer
49 views

NTP is not working in ubuntu

I installed NTP on my server and client then I changed time in client. When I run the ntpd -dq command, it shows: Unable to bind to wild card address 0.0.0.0 , maybe another process is running
0
votes
1answer
35 views

Is there any reserved usersid in linux?

I am installing ntp latest package 4.2.8p6 by following this link http://www.linuxfromscratch.org/blfs/view/cvs/basicnet/ntp.html creating user groupadd -g 87 ntp && useradd -c "Network Time ...
181
votes
13answers
568k views

How to force a clock update using ntp?

I am running Ubuntu on an ARM based embedded system that lacks a battery backed RTC. The wake-up time is somewhere during 1970. Thus, I use the NTP service to update the time to the current time. I ...
0
votes
0answers
283 views

ntp.conf error. unexpected T_String, expecting T_EOC

Having a problem with my NTP server. It is an Ubuntu 14.04 VM. It seems to hang after a day or so of running. When it's up, it's working fine. I'm seeing these errors in syslog: ntpd[901]: syntax ...
7
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2answers
45k views

How do I disable ntpd?

I'm running Ubuntu in a VM. How do I disable ntpd?
-1
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2answers
193 views

How to edit /etc/default/ntpdate and prevent ntpdate from ever running without uninstalling

Since both ntpd and ntpdate rely on ntp servers, and since the Ubuntu repos have yet to complete an update of ntp to 4.2.8p4 (the version recommended by ntp researchers), I expect this means that both ...
0
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0answers
36 views

NTP question on ntpdc -c peers

I just started learning networking. I recently installed ntp on Ubuntu 14.04 running in Virtualbox on OS X. I was just trying to understand how it works. so when I executed ntpdc -c peers command in ...
5
votes
3answers
3k views

Should I run 'ntpdate' regularly or should I use the NTP service?

I think there are two solutions for keeping the time in sync on my machine. One is to run an NTP service, another is to run the ntpdate regularly by putting it in a crontab. This is how I understand ...
5
votes
2answers
1k views

How to configure UFW to allow ntp to work?

I've enabled UFW on one of production servers with configuration: Default: deny (incoming), deny (outgoing). For NTP synchronization, I've installed ntp and it's currently running. Can someone advise ...
4
votes
2answers
6k views

Disable daily anacron mail updates

Every day, I get the following mail delivered by postfix: From: Anacron <root@name.domain> To: root@name.domain Subject: Anacron job 'cron.daily' on name Content-Type: text/plain; charset=US-...
0
votes
0answers
23 views

How to change date in ntp server

I have local network in which I would like to setup a local ntp server with old date. Architecture looks like this: For now it works ok on PC1, PC2 - I get NTP packets from local server, but I ...
0
votes
1answer
574 views

How to update ntpd to the latest version to patch the latest vulnerability?

This week a new attack on the Network Time Protocol Daemon (ntpd) was demonstrated, see this paper. This could potentially wreak havoc with my HTTPS website or other time sensitive services I am ...
17
votes
3answers
35k views

Unable to synchronize time using NTP

When I try to synchronize time using NTP. Using the below command sudo ntpdate -b pool.ntp.org I get this error saying NTP socket is in use. How to fix this? 18 Jan 05:53:49 ntpdate[21340]: the ...
2
votes
2answers
1k views

Is there a program for analyzing NTP server statistics?

I'm running Ubuntu 12.04 and have the NTP server running, apparently OK. I run the Meinberg NTP server on my two Windows 7 boxes and use its associated server monitor to keep track of what it's up to. ...
26
votes
4answers
8k views

How does Ubuntu synchronize time without ntp?

By clicking "System settings -> Time & Date -> Automatically from the Internet" I can synchronize time from the Internet. However, I find that I don't have a ntpd daemon (It's not even installed)...
2
votes
3answers
11k views

Timezone appears to be set correctly, but time is 7 hours off

I'm installing ubuntu 12.04. On the time/date settings, I tried to click on Seattle (where I am), but it only registered Vancouver. I modified the ntp config files to use the north american pool, if ...
1
vote
1answer
517 views

Reduce ntpdate timeout when DNS settings invalid?

I have an issue where ntpdate times out after exactly 80 seconds in the event that DNS is invalid (or in this case, host is stuck behind a firewall). I would like to bring this timeout down to ...
0
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0answers
175 views

Cannot install ntp server

I install ntp server on ubuntu Code: aptitude update aptitude -y upgrade aptitude install ntp Get error ntp: depend libopts25 (>= 1:5.18) which is a virtual package Please help me.
1
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0answers
94 views

Set up NTP server that does DST too?

I have several devices (routers and webcams) that do not support DST automatically. But they do support NTP servers. So I thought, would it be possible to set up my own NTP server that also adjusts ...
1
vote
1answer
45 views

Commandline tz and ntp [duplicate]

What is the easiest way to set an incoming ntp server and then set the local tz so the ntp is syncing correctly?
0
votes
1answer
318 views

iptables set-mark doesn't work

My machine has two network interfaces, one is wired (eth0) and the other one is wireless (wlan0). The wired one cannot connect to any external NTP server because there is a firewall outside. The ...
0
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0answers
30 views

Is the difference between the system time of the Rumtime normal?

I have to questions regarding the System Clock. (# date) It is it normal hours during the Runtime System is getting faster or slower? I know it can be synchronized with the network time through the ...
1
vote
1answer
64 views

How to calculate NTP [closed]

I'm relatively new to this scene and I haven't got a clue how to figure out the output of this. I hope someone can assist as I really want to learn how. date -u +%F | sha1sum | head -c8; echo
12
votes
7answers
63k views

Unable to sync time using `ntpdate`, error: “no server suitable for synchronization found”

My ntp.conf file: user@pc[0][07:37:40]:/etc$ cat /etc/ntp.conf idriftfile /var/lib/ntp/ntp.drift server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server pool.ntp.org Command output:...