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Questions tagged [time]

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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Linux: Set timezone offset that doesn't exist? [migrated]

Is it possible on any Linux to force a timezone offet that is outside the "valid" range -12 to +14? I'm looking for a way to temporarily simulate a "local time" (for testing purposes) that might be ...
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38 views

Why did w32tm /resync cause it to correct itself, then overshoot?

Background: My LAN's Windows Server 2012 R2 Domain Controller had been running without any external time server for a few years and I finally synchronized it now. It had been running about 2 minutes ...
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2answers
21 views

How do I change the date in Google Cloud Container-Optimized OS?

I try to set date: sudo date -s "28 OCT 2018 15:00:00" but before I need to disable NTP timedatectl set-ntp false Google Cloud Container-Optimized OS doesn't have timedatectl util -bash: ...
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63 views

CRON messages being delayed for arbitrary long time in syslog

I found in a few servers's syslog that some of the CRON related messages are written in a wrong time, like the following: Aug 21 06:26:01 hty-controller CRON[30159]: (root) CMD ( python /.../...
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0answers
53 views

NTP does not update until after I poll it

I have NTP setup to run with GPSd and all is well. The issue arises after about a week of my raspberry pi being disconnected, NTP will trust the old date on the system clock. Since the GPS takes a ...
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1answer
164 views

linux system time temporally jumps

I saw a strange system time changing behavior in some (hardware) servers: in /var/logs/syslog, the date time preceding each log message sometimes change to a random one and gets back to normal in the ...
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3answers
222 views

Domain Controller time won't sync with NTP server

I'm having a problem with a domain controller which won't sync with a time server. I've tried everything I can think of and I've already googled many fixes, but nothing seems to work. This is a ...
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0answers
106 views

systemd timer OnCalendar is not restarting

I have a problem with systemd timers. I want to run a bash-script every minute. This is my runmyscript.service file: [Unit] Description=RunMyScript [Service] User=myuser Type=simple ExecStart=/bin/...
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1answer
70 views

How to reduce “Connecting Time” reported by GTMetrix?

I've a cloud instance with Linode running CentOS 7.2, PHP 7.1, Nginx & Wordpress (latest version). 1 CPU + 2GB RAM. While checking GTMetrix stats, Connect time is showing as 127ms. I'm trying to ...
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0answers
850 views

Ubuntu Server 18.04 taking very long to boot up

I've installed Ubuntu Server 18.04 as a VM to use as a web server and it's taking very long to boot up. During the booting process 100 seconds go by without any notice of what's happening and then the ...
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2answers
213 views

How to do proper VPS timekeeping?

I'm configuring a VPS to log some time-series online data and I notice that the time is off. I'd like to have better than 10 second precision on this. I read somewhere that VPS timekeeping is ...
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1answer
22 views

Process start time and running time do not match

We have a situation where times present by START TIME and TIME presented by "ps" are not matching. When I say matching I mean - TIME shows that a service is running longer than it actually is. ...
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1answer
32 views

Time on Windows servers out and won't stay corrected

I have a bunch of windows servers that are VM's running on a group of hypervisors, all in a domain environment. Its a mix of Server 2012 R2 and Server 2016 For some reason the clock is out by about 7 ...
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1answer
42 views

Why is my internal clock always 1.3 seconds off?

I ran w32tm /stripchart /computer:time.windows.com just for fun and found out that my clock is 1.3 seconds behind this timeserver. Not that I think Microsoft is wrong, but I tried it with various ...
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2answers
164 views

System time is off by up to hundreds of milliseconds despite NTP sync before boot

I'm running a couple of servers which need a pretty tight time sync (<50ms) as they are running a Paxos algorithm. The servers are running NTP and are successfully sync at one point. According to ...
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0answers
266 views

Samba4 AD Time Sync

I know this question is asked a lot, and I've googled for days, but none of the solutions I have found so far work. My problem is this: Windows 10 workstations are not syncing their time with my ...
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1answer
1k views

Windows Server 2012 R2 time resetting by 2 hours (-2 hours)

The server doesn't host any VMs and doesn't belong in a domain. In the Windows "Date and Time" settings, I have the correct time zone and set the correct time. But after some hours when I connect ...
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2answers
236 views

Chef-Server 12 Getting me errors when the node is not time synced

I'm getting this error when the clock on my node is different than 15 minutes from my chef server. Authentication Error: Failed to authenticate to the chef server (http 401). enter code here`...
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0answers
198 views

RDP: Cannot connect to server due to date or time difference

I have a server that I RDP into all the time. Every few days, all of a sudden, it will start throwing the cannot connect to server due to date or time error. I can still connect via IP, and have ...
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0answers
17 views

Changing Polling times on a VM running under Server2012 R2?

Is there a way to know or change the polling times of VMs running under a Hyper-V 2012 R2 server? We have set all the hosts and physical domain controllers to keep time with our new GPS time server ...
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0answers
43 views

How to read VMware interrupt backlog?

The VMware document titled "Timekeeping in VMware Virtual Machines" have the following referente to the issues with the time drift: If the virtual machine is running too slowly, perhaps as a result ...
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1answer
4k views

Docker - Timezones in containers not same as on host

In all my running docker containers the containers system time is set to UTC whereas on my host (debian) its CEST. Why dont they sync automaticly? How do i make them set the right time when bringing ...
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0answers
36 views

Windows Domain - Time period until User needs to re-authenticate to the Domain?

I run a Windows Domain (Server 2016) and was wondering how long is the default time that a user can still log in to his computer without having a connection to the domain controller? If the user is ...
4
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1answer
1k views

How much clock asynchronicity can secure protocols tolerate?

I've noticed that connections to a secure server got reset if time is out of sync on a server. I believe time synchronization protocols can be just as precise to the order of network latency with the ...
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3answers
159 views

Incorrect Ubuntu server time [closed]

I use 14.04.1-Ubuntu. When execute date in command line, I get time which about 1 min different comparing Greenwich Mean Time or other source. I synchronized it using sudo ntpdate -s time.nist.gov few ...
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1answer
550 views

Windows 10 eventually changes time to UTC

I have 9 Windows 10 clients for whom I can not set the time. I proceed to date and time, change the time to the current time and timezone and then within an hour the time reverts to what appears to be ...
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36 views

Ubuntu Systemclock HWClock jumps 20 seconds and back

short explained but no idea hot to solve issue: My Hardware clock (Ubuntu 16.04) is jumping once a minute 20 seconds or so in the future and then back. I have issues with some timestmap comparisation ...
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1answer
632 views

RTC time is going totally wrong after a few minutes (Ubuntu 16.04 + Hyper-V)

My RTC time on my Ubuntu 16.04 is going crazy. After a few minutes the RTC time is going totaly wrong. The strange thing is, if I disable NTP Service (timedatectl set-ntp false and service ntp stop) ...
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2answers
1k views

ntpdate, ntpd can update time from time.google.com but the ntpd service fails

I'm trying to synchronise my Ubuntu 12.04.5 instance with the Google timeservers at time{1,4}.google.com and I can successfully query using both ntpdate and ntpd but once I start ntp as a service it ...
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0answers
385 views

MySQL Communications link failure periodically every 61 minutes

Interesting, strange problem. Have a production system running an application distributed across multiple servers, which all read and write to a, separate, MySQL Server. MySQL Server version 5.6.31 ...
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1answer
166 views

Pruning of backup files as they get older

I'm looking for a tool (for Linux) that will prune my backup files, not like the standard logrotate that completely deletes them after defined number of rotations, but where the files are basically ...
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1answer
539 views

start time in openssl s_client

After running the openssl s_client command to connect to a remote host. The following output was shown on the terminal. Can somebody please help me understand the start time in this log. What does it ...
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4answers
14k views

How to set system time dynamically in a Docker container

Is there any way to set a Docker containers system time dynamically (at run time) without effecting the host machine? Using hwclock --set --date "Sat Aug 17 08:31:24 PDT 2016" gives the following ...
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1answer
257 views

PST timezone represented as UTC (Ubuntu 14.04)

Received an error earlier this afternoon that the time was wrong. Investigated it and found out that the time on the server (represented as PST) was few minutes ahead of local time. I ran the ...
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1answer
148 views

'date' on SLES 12 SP2 instantly reset

I'm attempting to test my system monitoring by temporarily disabling NTP and using "date -s '5 minutes ago'" to change time enough to trigger my alerts. This test works fine on SLES 11 and SLES 12 SP1....
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1answer
135 views

Is PTP really more precise than NTP? If so, why?

I have read quite a bit about NTP and PTP time keeping protocols. While many sources claim that PTP is more precise than NTP for that type of granularity - the reason is not as clear. Why can't NTP be ...
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1answer
37 views

httpd logs show different time then machine

I am having an issue with my webserver, in that the logs that apache is writing have a different timestamp then my machine. This is causing some issues with other services parsing this file.. $user@...
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0answers
370 views

Testing Daylight Savings Time Switch

We have a case where we need to test some scripting and application code related to daylight savings time. We wanted to simulate the daylight savings time switch by disabling the NTP service and ...
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1answer
4k views

Fix Windows Server 2012 R2 system time?

I have managed many Windows servers for several years, but I have never experienced anything like this: We have a Windows Server 2012 R2 running as virtual machine on an Ubuntu Server with KVM. In ...
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1answer
663 views

What is the minimum annual overhead required to admin an On-Premises Exchange Server

I help run three businesses, and we use two Exchange servers (Windows SBS) for basic email and file sharing. These seem to take up a lot of admin time when contrasted with the linux file server we ...
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1answer
67 views

Scheduler to switch things on/off based on weekday, date and time of day [closed]

I'm looking for a Linux program that can give me an on/off answer based on time. I'm thinking of something that can read simple rules like these mon-wed 18:30-21:15 thu 17:30-21:15 fri 14:00-...
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2answers
312 views

Turn OFF NTPD immediatly synchronization

I have task to synchronyze linux device with ntp server. Documentation said that by default ntpd check the difference between system time and server time, and if offset is within panic threshold(1000s ...
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2answers
3k views

Time sync on non-domain joined servers

I have a server which is in a workgroup in a separate network from the rest of the domain. As a result, it cannot use the domain controllers as a time source. The server is a Windows Server 2012 R2 ...
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1answer
13k views

What time zone is a cron job using?

I'm guessing there's a difference between my PHP time and the server time. When I check the current time in PHP, it's showing that MST is being used. However, cron jobs aren't running at the correct ...
3
votes
1answer
74 views

Interpreting timestamp format on iDRAC servers

The timestamp format on the DELL iDRAC format I have is the following: 20160714195526.000000+000 20150325225105.000000+000 20150311200640.000000-300 How should I interpret it (I want to parse it to ...
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1answer
539 views

which table should I query for date & time in zabbix?

i need to query date and time in zabbix server. which table exactly stores these 2 parameters? Actually there is a table named history and there are two fields in that table named "clock" and "ns", ...
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1answer
296 views

Linux timezone not changing

Unable to change the timezone to PST8PDT even after trying all the possible methods [root@test ~]# date Tue May 10 07:24:18 EDT 2016 [root@test ~]# ll /etc/localtime lrwxrwxrwx 1 root root 27 May 10 ...
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1answer
48 views

Measuring system clock (time) of a remote server

What are the network protocols that can be used to measure the system clock (time) of a remote server? So far I have: Query with NTP TCP Timestamps HTTP headers Are there any other?
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0answers
236 views

How to change server time safely for testing purposes

We have a Debian server (in a VM) running a Java application on a Tomcat server, using a Postgres database. It's a testing environment, so we can do anything we want to it. Every once in a while, we ...
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1answer
543 views

How to set a timezone of an E2 instance?

I have a Ubuntu server on Amazon AWS EC2. When I log in there, I see there the following system information: System information as of Mon Apr 11 06:42:30 UTC 2016 I am currently in LA, CA - so here'...