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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.

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.

It has been said that time is used by the universe to ensure that everything doesn't happen all at once.

It has also been said that: "Time is an illusion, lunchtime doubly so." Not everyone agrees on the nature of time, and time is not fully understood even today.

Because human time perception can be wildly inaccurate, and many system services rely on the close synchronization of clocks, we have specialized clocks do the measurement of time for us. On the Internet, data from these clocks is made available via .

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What data type do big applications use to store time data?

I am trying to find out which data type is better to store time data inside either MySQL or Cassandra database for a big application like Facebook or Instagram? There are a lot of similar questions and answers but I couldn't finally realize which…
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Windows NTP Server Registry Configuration

I inherited an environment with a Windows 2012R2 Domain Controller (serverA) set as the NTP server. This server is going to be retired shortly for a new (separate) 2019 instance. The domain controller does not have the PDC Emulator role assigned to…
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Incorrect PTP timestamps

I have trouble syncing to Linux systems using PTP. Setup: Two PCBs with a BegleCore module and a DP83640 PHY are connected with each other over Ethernet. One board should act as the PTP master, the other as the slave. Debian 10, Kernel:…
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CRONTAB - Summer/Winder Time-Change

Since there can be problems with the time change from summer/winter or winter/summer, I wanted to ask how I could solve the problem within the bash script-2? I think in the winter time it should not come normally to problems since CRON acts here…
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High time accuracy on Windows Servers - alternatives to w32tm?

Microsoft's Windows Time Service is not designed to, and does not maintain second accuracy: http://blogs.technet.com/askds/archive/2007/10/23/high-accuracy-w32time-requirements.aspx What software is available for Windows servers that maintains…
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chrony time server cannot synchronize with time servers from the internet

My chrony time server with the version: 3.5-6ubuntu6.2, can get the time from another internal time server but not from time servers on the Internet. Could you please help me to synchronize my chrony server with a time server from the internet? The…
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PPS Integration with chrony

I am trying to get chrony to ingest a PPS signal to compare against just an NTP server. The PPS signal is recognized when I do ppswatch and ppstest, but when I do chronyc sources, the LastRX field occasionally goes up to 20+ while the NTP server…
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Centos Linux stuck in time

Has anyone seen the Linux time being stuck, it has been driving me nuts since yesterday. # date Thu Apr 2 16:35:04 UTC 2020 # date Thu Apr 2 16:35:04 UTC 2020 # date Thu Apr 2 16:35:04 UTC 2020 # date Thu Apr 2 16:35:04 UTC 2020 Here was about…
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Centos NTP time skew alerts

I have a couple of NTP Stratum 2 servers, and these are in sync with a Stratum 1 GPS appliance, and also peered between them selves. I would be interested in creating a job, which will create an alert if the time difference between Stratum 1 and…
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Convert date and time from output

I have a file with date and time on a couple thousand lines. I need to convert: 2019/08/02-01:23:50+0000 To: 02/Aug/2019-01:23:50 +0000 I so far have th=`grep -o '\[.*\]' test.txt | sed 's/\"//g' | head -1 echo…
Ron Russey
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Machines experience time offset despite chronyd service running

we have 3 machines in the cluster ( redhat 7.2 ) linux_machine1 linux_machine2 linux_machine3 the machines time are like this Sun Sep 1 13:54:20 UTC 2019 - linux_machine1 Sun Sep 1 13:34:15 UTC 2019 - linux_machine2 Sun Sep 1 13:53:35 UTC 2019…
shalom
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Manually change the time in CentOS 7 forwards and backwards

I want to do tests with some time based applications. I want to set the system time 3 days in the future or 5 years in the past. CentOS 7 is not allowing me to do this. Both commands below work, but after a few seconds the time is reset back to my…
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Monitoring User Account Time

Is there a good way (on networked *nix systems) to keep track of how much time user accounts have been logged in on a daily/weekly/monthly basis? Also, it would be cool if I could set adjustable time quotas on user accounts, so that they would be…
singpolyma
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Inconsistent elapsed time for mysql/mariadb query

Checking the elapsed time for a database query for munin monitoring,I have created a script, the time measurement part being: start=$(sed 's/^0*//'<<< `date +%N`) /usr/bin/mysql -u 3da_d9 -p****** --host="127.0.0.1" --port=4002 -e "SELECT f.*,…
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Properly setting date on Linux machines

I am trying to set the system date on my linux machine. If it matters, it is an Amazon EC2 machine that I provisioned. I tried to set the date with this command: sudo date -s "19 APR 2018 11:14:00"; However the date does not stay set for long; when…
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