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

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176
votes
13answers
547k 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 ...
18
votes
3answers
38k views

How to set Ubuntu to synchronize my clock with a time server?

I would like Ubuntu to automatically synchronize my system clock with a timeserver at startup. However, my PC isn't connected to the Internet until after I've logged in (plus 5 - 10 seconds for good ...
17
votes
3answers
34k 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 ...
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:...
24
votes
2answers
44k views

How to configure NTP time synchronization on a server?

I would like to configure my Ubuntu 12.04 server to synchronize its clock with a specific NTP server. Where to set this up?
7
votes
2answers
60k views

How do I setup a local NTP server?

I installed NTP server on Ubuntu Server 10.04 using: sudo apt-get install ntp The NTP daemon seems working and listening on the 123 port. However, I was not able to get the time from another ...
7
votes
2answers
44k views

How do I disable ntpd?

I'm running Ubuntu in a VM. How do I disable ntpd?
26
votes
4answers
7k 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)...
8
votes
2answers
9k views

Clock drift even though NTPD running

I'm having a problem with the clock drifting on my PC. I'M running Ubuntu 10.10 on an somewhat crusty IBM e-server (1.5GB RAM, 2.4GHz CPU) ntpd is running (started at run level 2) servers are ...
45
votes
4answers
105k 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 ...
14
votes
4answers
9k views

Why is Ubuntu's clock getting slower or faster?

Ubuntu's clock is off by about a half hour: Where do I even start troubleshooting this? It's allegedly being set "automatically from the Internet". How can I verify that "the Internet" knows what ...
20
votes
2answers
33k views

Where does ntpdate get its settings from and what is the “no servers can be used” error about?

When I run ntpdate on its own, I get the following output: 8 Jun 15:47:46 ntpdate[31251]: no servers can be used, exiting If I run it with the -q ntp.ubuntu.com switch, it seems to query just ...
12
votes
1answer
22k views

ntpd vs ntpdate: pros and cons

In order to keep the time accurate on a Ubuntu system one can either: Run the ntpd (network time protocol daemon) which will run all the time and continuously adjust the system time when clocks ...
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 ...
7
votes
3answers
4k views

How can I force Ubuntu to use the BIOS internal clock instead of NTP or whatever its being used?

My clock starts running out of sync in Ubuntu which doesn't happen in Windows. The problem is that it just starts losing time after a moment of syncing it with an NTP server, that means the clock is ...
5
votes
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 ...
4
votes
4answers
8k views

“ntpd unable to bind to wildcard address 0.0.0.0 - another process may be running”

On my Ubuntu 13.04 (using AWS). When I start a new machine or when I reboot my machine ntp does not start and I see the following in the syslog: Jan 10 02:56:49 ntpd: unable to bind to wildcard ...
3
votes
5answers
26k views

“no server suitable for synchronization found” error when trying to run `ntpdate`

I am trying to setup the NTP server on Ubuntu machine. Am breaking my head in this particular issue. Getting an error ntpdate[5005]: no server suitable for synchronization found when doing the ...
3
votes
1answer
2k views

Is there a way to make ntpd -gq run faster

This question is related to this question and this earlier question I asked on serverfault. Per my previous question, I'm interested in synchronizing the time on my machine in a fast (ideally less ...
2
votes
1answer
6k views

ntpdate “ no server suitable for synchronization found”

I have tried to disable the firewall and allow the port 123 as explained in other questions, but it didnt help me, it keeps telling me $ sudo ntpdate -u pool.ntp.org 5 May 05:41:40 ntpdate[3614]: ...
2
votes
1answer
902 views

How can I be sure that I'm using NTP version 4.2.8p1 or equivalent?

I've recently read about the vulnerabilities within ntp, here which can be closed by installing ntp version 4.2.8p1. However, I've used apt-get to install the latest version of ntp, on an Ubuntu 14....
1
vote
2answers
2k views

Can't run ntpdate on EC2

I have had some serious issues with time accuracy on my Ubuntu EC2 machines, with drifts of more than 60 seconds. A possible solution is running ntpdate or ntp, but I can't get them to work on EC2: ...