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Questions tagged [time]

`time` is a command line utility for running another program and summarizing resource usage

0 votes
1 answer
98 views

Do I still need to set my server's time zone to UTC?

OS is Raspberry Pi OS 12. It looks like timedatectl shows the date both in UTC and my local timezone. Since it looks like the OS keeps track of UTC explicitly, is there any reason to not set the ...
cat pants's user avatar
  • 147
4 votes
2 answers
337 views

Invalid date when setting one computer's clock from another

I have the following code in a Bash script, which takes the current date/time and sets it via SSH on a target computer: ssh <user>@<target> "date --set '$(date)'" This was ...
Richard Whitehead's user avatar
0 votes
0 answers
45 views

How to set the time so that it lags by 1 second

I need the time to lag exactly by 1 second. That is, so that the time is synchronized, but lags. Now I use timedatectl set-ntp on. How can this be achieved? Maybe there is a possibility to set the ...
SkyN's user avatar
  • 109
0 votes
1 answer
109 views

How to set keyboard shortcut to insert a timestamp (time & date) in KWrite?

KWrite is included as the default text editor in several popular Linux distros (such as Fedora KDE). Inserting a timestamp is a basic feature of text editors. How can one set a keyboard shortcut to ...
Amazon Dies In Darkness's user avatar
0 votes
0 answers
196 views

Timedatectl output does not change after running ntpdate command in Kali Linux

I am currently doing a pen testing CTF challenge on HacktheBox.com (HTB) that involves manipulation of Kerberos TGT tickets so need to sync my local system time on my Kali Linux instance with the ...
Anthony's user avatar
  • 101
3 votes
0 answers
73 views

Linux clock source from FPGA

I'm trying to get the Linux kernel (and system as a whole) to sync to a monotonically incrementing clock from a FPGA register in memory. The clock is 64-bits wide and divided into two 32-bit sections: ...
Ryan Sherlock's user avatar
1 vote
1 answer
120 views

Where can I find the configuration/setting for NTP to explain the specific behavior observed in an NTP client?

I have recently been doing a specific timing analysis of the performance of NTP under controlled conditions.  The experiment I performed was conceptually quite simple.  I have an NTP server running ...
Denis Barkats's user avatar
0 votes
1 answer
100 views

start command at given time interactively in terminal

is there similar command to sleep, but where I can specify given time, so that my command will start at given time, INTERACTIVELY in my current open terminal window? I know about at command, but that ...
Martin Vegter's user avatar
18 votes
6 answers
9k views

How does a Linux operating system stand going back in time (when applying winter time for example)? Going back a second, would it be the same problem?

I'm asking myself after having read on papers that around the year 2035, we, on the earth and our computers by the way, might have to correct our time by one second back to comply with astronomical ...
Marc Le Bihan's user avatar
0 votes
1 answer
991 views

Can I configure tmux to show seconds of current time upon Prefix t?

On Prefix t (by default Ctrl+b t), tmux displays the time, and it looks something like this: Is there any way to configure this, e.g. to show the seconds, too? I tried setting export LC_TIME="%H:...
Vince Varga's user avatar
3 votes
1 answer
101 views

how to format `time` output [duplicate]

I'm using Ubuntu 23.10 x64. The time program has an -f flag but when I run it says -f command not found. time -f "%Uu %Ss %er %MkB %C" ./countwords hamlet.txt I'm trying to get the time ...
Leahcim's user avatar
  • 299
1 vote
1 answer
53 views

Why does /usr/bin/time coupled with GNU parallel output results before command's output rather than after command's output?

Scenario: $ cat libs.txt lib.a lib1.a $ cat t1a.sh f1() { local lib=$1 stdbuf -o0 printf "job for $lib started\n" sleep 2 stdbuf -o0 printf "job for $...
pmor's user avatar
  • 593
0 votes
2 answers
100 views

Speeding up time flow for stability testing

Is it possible to speed up time flow in Linux system? Doesn't matter if virtualized or on bare metal. I need to test if my program could have uptime for ~10 years. So accelerating about 4000 times of ...
Libor Tomsik's user avatar
1 vote
2 answers
8k views

What is the command to change the 'System clock synchronized:' setting from 'no' to 'yes' in photon os

I have a VM running Photon OS 3.0. NTP is not configured and it is using the hardware clock. It has fallen out of sync. The hardware clock hwclock is in sync with the hypervisor time, but when I run ...
Anand's user avatar
  • 31
35 votes
2 answers
4k views

Why is filesystem time always some msecs behind system time in Linux?

In Linux, it seems that filesystem time is always some milliseconds behind system time, leading to inconsistencies if you want to check if a file has been modified before or after a given time in very ...
Alberto Pianon's user avatar

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