Time is a dimension in which events can be ordered from the past through the present into the future, and also the measure of durations of events and the intervals between them.

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How exactly date/time works in MySQL with timezones?

My understanding was: everything is UTC internally dates are displayed in @@session.time_zone timezone for current session if I do INSERT with +02:00 TZ set and insert 2015-05-15 10:54 it is parsed ...
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30 views

How to synchronize the time in Debian6 server? We have 30 min delay in our VMs

I can't have the correct time in our servers. We get always the same delay in the three of them (they are VM on the same server). We use ntp to have our date always synchronized· The main server ...
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1answer
22 views

ntp synchronize time between peers

I am a newbie, so please bear with me. I have a network of around 10 computers for which I want to synchronize their time up to millisecond precision. The computers do not have Internet connection. ...
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19 views

Prevent users from changing the system time on windows

I don't want users to be able to change the system time. For this, I have set the Group Policy "Change the system time" to include only my Administrator account. I want to know the validity of this ...
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49 views

Precision Time Protocol on AWS

We have a problem that requires a group of AWS linux servers to have the time exact by the millisecond between each other. (different nano seconds is ok, and we don't care if it is the real hour.) ...
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8 views

Windows Server 2008 NPS Granular time

Like a previous poster I am configuring NPS as a RADIUS authentication source for my wireless clients. I need to impose a Time and Day restriction to the Network Policy that need to be more granular ...
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0answers
6 views

Linux Mint system clock is days ahead after an overnight laptop suspend [migrated]

I'm a long-time Ubuntu user, who recently started trying out Linux Mint on a laptop. This is not a dual-boot setup, Mint is the only OS on the machine. When I suspend the laptop (i.e. close the ...
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1answer
16 views

MySQL Time Different from System Time

I'm having an issue where MySQL is reporting the time as six minutes later than the system time. I have verified all my timezone settings are correct but don't know how to troubleshoot the six minute ...
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1answer
38 views

Does NT5DS time synchronization have any place in a mixed Windows / Linux environment?

I am working on a plan towards overhauling how time synchronization is handled on our network. Currently our network is predominantly Windows-based, in a fairly standard AD domain broken up into ...
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23 views

Run application from network drive takes long

This problem started recently, and I wasn't able to find a solution. Not even formatting solved. We have a program on our network drive and the Whole company accesses to this single exe. Usually the ...
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3answers
54 views

Why my browser wouldn't load all image resources at once?

I am trying to optimize the loading time of a webpage. Currently, the main http request can be done in under a second, however, the consenquent loading of images seems "to cascade": ...
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2answers
49 views

How to speed up (very remote) overloaded server connection

I'm living in France and I need to load a page from a far far away server (still in the same galaxy). "Far" is Canada to me, meaning over 8 000km of internet cable. The problem is, this server is ...
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1answer
69 views

How do you manually trigger the first sync for 'Internet Time' in Windows?

When launching a Windows Instance on AWS I'd like to trigger the "Internet Time" to be updated via the command line (powershell or cmd). If I go to "Adjust date/time" and select the "Internet Time" ...
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1answer
73 views

Time issue in Windows domain Hyper-V

I ran command on our Domain Controller that has PDC Emulator Role: w32tm /config /manualpeerlist:"0.pool.ntp.org 1.pool.ntp.org 2.pool.ntp.org 3.pool.ntp.org" /syncfromflags:manual /reliable:yes ...
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1answer
81 views

Time problems in a Windows domain

I need some help getting NTP set up correctly on our Windows domain. We have 2 physical servers: Physical Server 1 Domain Controller (DC1) Physical Server 2 (Hyper-V Host) Data 1 (also a Domain ...
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3answers
429 views

Where do computers/servers in a Windows Domain get their time settings from? [duplicate]

I have 5 Windows Server 2012 servers and around 100 computers in our domain. Recently I noticed that the time on the servers and computers is around 30 seconds fast. Where do servers and computers ...
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36 views

Will changing the date or time on windows server 2008 break any websites or anything else?

Sorry if this is a newb question, but I was told by someone about a month ago that if I change the date and/or time on one of our servers it could break our websites or something. I can't fully ...
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3answers
265 views

Risk of starting NTP on database server?

I've heard rumors of bad things happening to database and mail servers if you change the system time while they are running. However, I'm having a hard time finding any concrete information on actual ...
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1answer
41 views

How to correct the time on a Red Hat EL6 server? Clock is almost 3 hours behind

This did not work: [~]: sudo /usr/sbin/ntpdate pool.ntp.org 19 Feb 08:03:26 ntpdate[6939]: the NTP socket is in use, exiting So, I'm not sure how to proceed... also tried this to no avail: [~]: ...
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1answer
72 views

date and sleep during leap second [closed]

Did you ever watch what happens with a sleep during a leap second or what date will show us? Most UNIX systems can handle a sleep with a fraction of a second and the date command can display ...
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0answers
26 views

How to properly set apache timeout and number of simultaneous users?

After reading the apache documentation and searching for something that could help me on ServerFault, I'm still confused about how apache Timeout and MaxRequestWorkers work. In particular I have two ...
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2answers
36 views

bind cache not used?

i installed a classic bind9 dns server inside a local network, working as a forwarding dns server, there is my config file (i just added my ISP DNS servers as forwarders): options { directory ...
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0answers
31 views

Using RTC to synchronize ntpd when offline

I need a stable configuration, presumably using ntpd, to keep system clock as precise as possible. Background: I have several embedded devices (arm9) running linux (currently: 3.16.1 / debian 7.2) ...
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64 views

tzutil.exe keeps changing server timezone

The time-zone on my windows 2008 server keeps being changed, I performed an audit on the "RegQueryValue" registry operation and "TimeZoneKeyName" key found on the following path ...
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53 views

Syslog randomly logs bad time [duplicate]

Try as I might, I can't figure out why this server randomly timestamps syslog entries with bad time. Here's a 5-minute stretch of syslog from a few minutes ago. You'll notice there are two places ...
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1answer
52 views

system clock skewing backwards 112 seconds

I'm troubleshooting a problem on one of my NTP servers. This server seems to defy logic, and I'm at my wits end trying to troubleshoot it. Roughly every 162 seconds, the system clock reverts to ...
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3answers
2k views

What is a ToD server, “Time of Day” (Not NTP)

I got a simple task: Setup a ToD server... It is not NTP. It runs on port 37. It seems to be bundled with inetd or xinetd. Shall be installed on Debian or CentOS. Alternatively FreeBSD (pfsense ...
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1answer
49 views

Measuring request response time by port

So, I'm currently working on a project in which I spin up a set docker image on a number of different machines and configurations. This image basically contains a web server that accepts a number of ...
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2answers
408 views

Windows Server 2012 time keeps setting itself 12 minutes ahead

Our Active Directory server has a problem whereby the time keeps setting itself 12 minutes ahead of the real time. This causes authentication issues on the network. I have tried syncing to an ...
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123 views

Domain time drifting with VM DCs / host domain members

I'm following the advice given in this article: ...
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1answer
199 views

What is the best way to measure latency via a “telnet to port” test, preferably with built-in Linux tools?

I'm writing a Graphite/Diamond collector measuring network latency. Specifically it should measure the time it takes to open up a connection to a port on a remote server. And it needs to work via ...
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1answer
42 views

Check how much time has elapsed for Cron job and send email

There is a cron job that is set which runs throughout most of the day, sometimes the job gets stuck and I would like to set a time or check on it which let's me know if it has been stuck for more than ...
2
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1answer
127 views

Can't synchronize time in Ubuntu (Europe/Moscow)

I've got this Ubuntu server virtual machine. I'm trying to setup a correct time on it. I've selected a proper timezone (Europe > Moscow) via sudo dpkg-reconfigure tzdata. After that, I'm using ...
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188 views

Server times off by over 1 minute after recently syncing

I manually synced the times (and matched hardware times) on two servers A and B. NTP was running on both machines, so I made sure the /etc/ntp.conf files were identical (the time servers on B were ...
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98 views

How to configure a redundant PTP server

I have a Sonoma GPS time server and a server, which should synchronise itself to the GPS clock, and serve as a fallback option. The time should be synchronised using PTP (Precision-Time-Protocol). ...
5
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2answers
697 views

Synchronize clock with NTP while online, and with RTC while offline?

Is there a existing mechanism that synchronizes a linux system with NTP while online, and with a predictably drifting RTC while offline? We operate remote "collectors": embedded Linux systems that ...
3
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3answers
556 views

How to keep the time on multiple servers in sync

I want a cluster of servers to have the exact same time. All are using UTC time zone. Using NTP currently, i still see they seem to be off by 10-20 miliseconds each. Whats the best way to have them ...
5
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3answers
165 views

What is an acceptable secure time source in a datacentre environment?

GPS and NTP are two very typical time sources when accurate clocks are required. However, each has an important failing. NTP does not provide authentication of the time source, and so may be ...
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0answers
49 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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245 views

Graylog2 date extractor from tab-delimited file

I have a tab-delimited logs with such messages: 2014-06-01 00:00:56 192.168.1.1 968 http://yandex.ru I can extract date and time with regexp (\d{4}-\d{2}-\d{2}\s*\d{2}:\d{2}:\d{2}) but when I ...
4
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1answer
2k views

Why is the time on my Server 2008 R2 DC wrong? It's syncing to ntp.org, it claims

OK. After a lot of fun with syncing time across my workstations, I got that sorted out. My workstations are now perfectly synced with my Server 2008 R2 Domain Controller (physical server, not ...
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1answer
200 views

Apache TOP command time format?

When running top on an Apache server, what is the time format for the output? For instance, is it minute:second.second? http://i.imgur.com/wBx8PAh.png Edit: I'm running on Ubuntu 14.04 and the ...
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1answer
68 views

Binding timestamp value to a variable in crontab

I'm basically trying to declare a variable with a date() value in crontab as I will constantly be using the same date structure over and over, here is what my crontab looks like so far. php = ...
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48 views

Do I Need a PTP Aware Switch?

We have a PTP Grandmaster clock which we will be using on a dedicated network for PTP time synchronization. It is necessary for us to use a switch to distribute the signal to multiple clients. Does ...
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1answer
112 views

EC2 - MS Server 2012 constantly resetting its own time

I have an EC2 box of instance type m2.4xlarge running Windows Server 2012 Standard in a VPC in US-West-2. The following ports are open inbound: TCP 1433 (MS SQL) TCP 3389 (RDP) UDP 123 (time synch) ...
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711 views

Is it better to use the systemd service unit's Restart & RestartSec, or use a systemd timer unit?

I have a couple of in-house automated scripts running at periodic intervals. One is every five minutes, the other is every minute. They don't really need to be ran on-the-dot; e.g. I don't care if ...
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1answer
2k views

How to configure a Cisco Catalyst 2960 to synchronize with an NTP server

I would like to synchronize a Cisco Catalyst 2960 series switch with a publicly available NTP server such as time.apple.com. I have reviewed the knowledge base article here: Catalyst 2960 ...
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2answers
554 views

Weird syslog order

Have you ever seen wrong order in /var/log/syslog ? I think that it causes only crontab. Jun 28 22:20:01 alex CRON[2327]: (root) CMD (something > /dev/null) Jun 28 22:21:01 alex CRON[2700]: (root) ...
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3answers
265 views

System time on Windows Server 2008 server increasing continuously

The system time of my Windows Server 2008 server is increasing continuously. In order to adjust the time, I have to shutdown and reset the time. I have tried changing the CMOS battery, but the ...
2
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1answer
3k views

Is timesync still required for Windows Server 2012 R2?

Our servers are on a workgroup, we are a small company and do not use a domain controller. In Windows Server 2008 R2 we used TimeSync to help keep the most accurate time, not sure it was really ...