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1answer
46 views

How should I manage and troubleshoot NTP issues?

For some time now I've been fighting with some NTP issues in my company's network and I'm having a hard time to understand how the commands combine with the service. For example: In the server's ...
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0answers
17 views

Syncing client and server time for latency comparison

I'm struggling to sync my server's time (an EC2 instance in Dublin) with my local machine. I'm using sudo ntpdate ntp.ubuntu.com to sync my server's time with Ubuntu's time server. I'm then using the ...
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0answers
352 views

ntp is not syncing on centos server but gets response from remote server

I have googled for days before asking and I feel like I have tried everything but ntp is still not updating the time of the system automatically. I have left it running for days and still I get the ...
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1answer
157 views

how to skip ntpdate synchronization during boot on centos

I moved a centos server to a new IP and now it's stuck on ntpdate synch during boot. I just need it to boot once so I can assign the new IP. Going back to the old IP is not an option right now. CTL C ...
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0answers
586 views

Ubuntu 12.04 LTS ntp not working

I'm having major woes trying to get ntp working on several ubuntu 12.04 servers. Note this is NTP to keep the time set on those servers. Not to distribute the time! I've installed several of those ...
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1answer
1k views

ntpdate failing “Name or service not known”

I've got a NAS that is Linux-based (Linux version 2.6.32.11-svn70860) and it is not able to set its time using ntp. The previous SysAdmin is long gone so I have no idea whether this problem just ...
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2answers
180 views

Clock skew on my VPS server

I am having a problem with the time on my VPS hosted at Rackspace. Its running Red Hat Enterprise Linux 5.4. Date commands gives a time which is 11 minutes ahead of the actual time. I am running ntpd ...
0
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1answer
58 views

Debian Server System time and time used by processes are different

I have a dedicated server running debian 7, the system time shows "Wed Aug 7 04:28:26 EAT 2013" I have restarted the server several times but processes like deluge and apache return http headers ...
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2answers
2k views

enable/disable ntp service on ubuntu 12.04

Our application runs on Ubuntu 12.04 Precise. On this server, we have both ntpdate and ntp. How to enable and disable the NTP service on-demand? I tried # sudo update-rc.d -f ntp remove/default ...
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1answer
2k views

NTP can't synchronise or find a suitable server

The problem I'm trying to solve is that NTP won't synchronize: $ sudo ntpstat unsynchronised time server re-starting polling server every 64 s Edit: Here's some ntpq output: $ sudo ntpq -c ...
1
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1answer
251 views

ntpdate setting incorrect date after boot

I have a few Debian XEN virtual machines and upgraded them to wheezy(I need the 3.2 kernel for a project). Everything was okay until I rebooted on of the machines. My current problem is, that ntpdate ...
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3answers
356 views

CentOS VM, NTP synchronization problems

We have three CentOS 5.9 VMs on an ESX3.5 host. Because of the nature of the services we provide it is required that the NTP time is synchronized and the time is correct on all three of them. ...
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2answers
426 views

how to auto-run ntdpdate command?

I have a few dedicated servers and for some reason they are totally unable to mantain the time properly synchronized, every few days they start having differences of minutes in the clock. So I have to ...
1
vote
2answers
454 views

ntpdate wrong date

Hi all I have an ubuntu8 server where I have problems with date. My current date (Europe/Rome) is 9:35 If I do date print me 11:12:34 I have seen my ntp.conf is: server 0.ubuntu.pool.ntp.org ...
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1answer
1k views

ntpdate and firewall: no server suitable for synchronization found

I'm behind a firewall and only have access to ports 80 and port 443. How can I sync my system's clock? Here's the command I issue: sudo ntpdate -u 1.debian.pool.ntp.org But I keep getting the ...
8
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2answers
6k views

ntpdate and ntpd failing to sync clock on Linux

I have a strange problem with one of my servers. ntpd and ntpdate fail to work, but debugging shows no errors at all. At first I thought maybe a local or network firewall was blocking UDP port 123, ...
0
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1answer
106 views

Need one time server clock sync for latency test, what should i use ntdate or ntpd

All machines are Ubuntu I need to sync clock one time for all machine in order to do a latency test. I read this article that said - ntpdate is a bit of a blunt instrument - it can only adjust ...
0
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1answer
150 views

Why running ntpdate one after one dosnt set offset to 0

I am running ntp update , one after one (with sec between them), In the log i see that there is always an offset , even if update was run few sec ago. Why is that?Is there a chance to get 0 offset? ...
2
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4answers
4k views

ntpdate works, but ntpd can't synchronize

This is in RHEL 5.5. First, ntpdate to the remote host works: $ ntpdate XXX.YYY.4.21 24 Oct 16:01:17 ntpdate[5276]: adjust time server XXX.YYY.4.21 offset 0.027291 sec Second, here are the server ...
5
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3answers
222 views

Is an ntpdate correction atomic?

I've got the following in /var/log/syslog, from yesterday (July 30th) Dec 16 22:54:05 omap ntpdate[432]: step time server 91.189.94.4 offset 12052648.821465 sec ntpdate 91.189.94.4 "corrected" my ...
0
votes
1answer
641 views

ntpdate cannot receive data

I have a problem where running ntpdate on my server doesn't return any data therefore I get the following error: [root@server etc]# ntpdate -d -u -v time.nist.gov 12 Apr 01:10:09 ntpdate[32072]: ...
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3answers
1k views

How to moniter the ntpd and ntpdate running status?

I have four server which running with ntpd daemon, how can I moniter their running status? By the way, I running ntpdate command with crontab.
2
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3answers
101 views

How to select a server when ntpd is syncing by a linux server?

The following is my ntpd configure file. I have no idea, which one ntpd will choice while it's syncing? /etc/ntp.conf server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server ...
2
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2answers
459 views

Server Time is *WAY* Off

The time on my server is about 19 hours behind and I cannot for the life of me figure out how to synchronize it. I did follow the steps here, and this is the output: [root@ip-72-167-39-231 ~]# ...
3
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2answers
413 views

ntpdate ignores my timezone

I'm trying to set up time sync on a CentOS 5.5 VDS but can't figure out why it won't update to the correct timezone. e.g. After manually setting the correct date and time when I run this: date ...
0
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1answer
58 views

change priority of ntpdate

I managed to run ntpdate at a high priority. My initial thought is to use nice command, like: nice -n -10 ntpdate -p 8 -u $NTP_TIME_SERVER However, after checking the nice value of ntpdate command, ...
1
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3answers
380 views

Time cron not working

10 * * * * /usr/sbin/ntpdate pool.ntp.org >/dev/null 2>&1 The idea is to sync time every 10 minutes. However im waiting now for 15 minutes and nano /var/log/cron still returns ...
3
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2answers
5k views

ntpdate: no server suitable for synchronization found

[root@myHost default]# ntpdate -d pool.ntp.org 15 Apr 11:21:18 ntpdate[6331]: ntpdate 4.2.0a@1.1190-r Thu Feb 24 20:39:57 EST 2011 (1) Looking for host pool.ntp.org and service ntp host found : ...
2
votes
1answer
432 views

what is the easiest way to test the impact of NTP step changes on other software?

During testing of our configuration of Red Hat Cluster System, NTP stepped the time by 16 seconds, and soon afterwards the cluster software locked up. ntpd[30917]: time reset -16.332117 s I need to ...
3
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3answers
3k views

Disable Time Synchronization on Ubuntu

I am setting up a development environment with Ubuntu in a virtual machine. The date in the VM must be in 2009 due to some silly timebombing issues, so I want to disable any automatic time ...
0
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4answers
584 views

ntpdate shows 4second time drift / day

I started ntpdate running every night as a cronjob (on two servers). And every morning I have an email telling me the outcome. On one server it's correcting by about 0.8 seconds every day, which seems ...
0
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2answers
9k views

ntpdate - no server suitable for synchronization found

I have a newly installed Centos 5.2 box, everything seems working except ntpdate sync, I have done enable port 123 UDP to pass through the firewall. I have tried to use -u for unprivileged ports but ...
3
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5answers
6k views

ntpdate not updating system time in XenServer VM

We have a Debian webserver that I am trying to use ntpdate to keep the time in sync. When I run ntpdate ntp0.cs.mu.oz.au I receive 16 Sep 10:55:36 ntpdate[21626]: step time server 128.250.36.2 ...
19
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10answers
16k views

Compare NTPD and ntpdate

What are the pros and cons between these two ways to synchronize your server? It seems to me that your server would probably not drift more than 1 second every day, so ntpdate on a crontab would be ...