`time` is a command line utility for running another program and summarizing resource usage
3
votes
3answers
37 views
Get lines between two timestamps from a file
I have this large file that I need to go through using date and time.
Every line in this file has a date and time in it.
I need to search through the lines and get the lines that lie between two ...
1
vote
1answer
25 views
Set ls -l time format
I would like for all my ls commands that display a date, such as ls -l, to print the date column in a format of my choosing. Currently, I manually set this every time with --time-style. Is there any ...
1
vote
0answers
29 views
How to run a jar together with faketime
I need run a certain jar file with a mock time for testing purposes. When I execute the jar in the usual way
$ java -jar myjar.jar
it runs perfectly. But when I try to run it together with ...
1
vote
1answer
45 views
System disregards Daylight Saving Time
When DST started a few weeks ago, my laptop's system time did not switch accordingly. (IOW, its time is 1-hour behind.)
It is the only one of my Debian-based systems that is disregarding DST. My ...
0
votes
1answer
51 views
Time it takes to reboot a Linux server
Is there a way to work out how long it would take to reboot a Linux server? To clarify, the time from the reboot command starts to when the server is back up and running (ie all services started, ...
1
vote
2answers
27 views
Tracking/Monitoring Short-Lived CPU-Intensive Process on one CPU
So I've been working with this issue for some time now, and I'm having trouble finding the tools to troubleshoot this problem, which I have to imagine exist. So here's the basics of my problem:
We ...
-1
votes
0answers
6 views
time_t - Change from signed long to Unsigned long for Y2K38 - issues with localtime_r() [migrated]
Cross-compiler - EGLIBC
Processor - Altera Cyclone V FPGA with 512MB RAM
Distribution - Yocto
Requirement - To solve the bug of Y2K38 or Y2038 or epoch Roll over.
I have modified time_t from signed ...
3
votes
0answers
33 views
What process state(s) is counted into cpu time?
Two observations of mine (correct me if wrong):
In the output of time for timing a process,
'User' and 'Sys' come from wait (2) or times (2), depending on the particular system.
In Linux ...
0
votes
1answer
72 views
I want to measure the time between two jobs in a logfile
I have a logfile which name/directory is: /srv/uni/kani/LogDay.09-03-2016
The name of the logfile changes date every day. So tomorrow will be: `LogDay.10-03-2016' and so on...
I would like help to ...
0
votes
1answer
20 views
call `time` with format option
I want to measure execution time of commands and get (to me) strange behavior of the time command.
I call time like it is mentioned in the examples of the manpages with the -f or --format option and ...
0
votes
2answers
93 views
Convert unix timestamp to hh:mm:ss:SSS (where SSS is milliseconds) in AWK
How can I convert unix timestamp to hh:mm:ss:SSS (where SSS is milliseconds) in AWK.
For example:
echo 1456478048306 > time
cat time | awk ....... > readable_time_format
-4
votes
1answer
34 views
How to determine the CPU time of the execute of Makefile in linux or Unix? [closed]
below is my Makefile using to execute my numerical code.I would like to know the time taken by the CPU to execute these C programmes.
#Makefile
LDFLAGS = -DN_DIM=3
#LDFLAGS = -DN_DIM=3 ...
1
vote
0answers
39 views
On Ubuntu - /var/log/messages timestamps are 4 minutes ahead
As mentioned in the subject, timestamps in my /var/log/messages are 4 minutes ahead comparing to my desktop clock or the date command. If it was an hour, I would think this is a timezone issue, but ...
0
votes
0answers
37 views
Must set CMOS clock to localtime (due to DOS dual boot), timedatectl or hwclock seems to keep setting CMOS (hardware) clock to UTC!
This is beyond crazy.
I have a dual-boot system, one OS is FreeDOS (which has NO ability to deal with CMOS clock being anything other than local time), and the other is Linux Mint 17.
The way this ...
3
votes
3answers
345 views
How to sleep until a given date & time?
I want to write a shell where given a date (day-hour-min) e.g.
10:00 AM Sun
2:30 PM Mon
...
It sleeps until that exact date & time.
I thought one way of doing it is, I could get the current ...
0
votes
1answer
20 views
What service executes that sets up the real time clock
I'm looking for the service that runs that sets up the correct time on my system.
Does anyone know what service does this?
1
vote
0answers
39 views
System time in Minix with best precision
I'm working on a project to modify the scheduler in MINIX 3. So to test it I need to analyse the wait time and turnaround time. To calculate the wait time I'm storing the system time when the process ...
0
votes
0answers
44 views
Incorrect file creation/modification time
So I run a backup script on a home server running Fedora 23. I also run a prune script that removes files older than 30 days. This fresh backup file keeps getting deleted because it's creation or ...
0
votes
0answers
36 views
dd process real vs. sys time
I have two quad core workstations. One is based on Intel Atom x86_64 architecture (WS1). Another one is based on armv7l architecture (WS2). Both are running 3.10 kernel version.
Identical busybox dd ...
0
votes
1answer
32 views
Deleting a file after X days does not work [duplicate]
Ive tried multiple ways of writing this and im executing the script myself so it isnt the crontab that isnt working.
These are examples of what ive tried :
find /home/backups -mtime +1 -exec rm {} \;
...
4
votes
2answers
41 views
log of open and close time of a program
I want to get the total time a program was run daily for personal logging (from start to close even if it is in the background). For example: Firefox.
Is there a system log that keeps track of open ...
0
votes
2answers
54 views
Resource usage (% CPU) for given command on OS X
The time -v command outputs % CPU utilization for a given command on Linux. How do I do this on OS X? The Linux/OS X difference is illustrated here. I would like to measure multi-core utilization ...
0
votes
1answer
58 views
Setting time and date without using NTP
I have a "windriver" linux based Wimax ASN, and when ever I login, I find the date and time is wrong (example: "15 jul 2010").
Whenever I set both the date and time with the date command, or the ...
2
votes
1answer
72 views
Time synchronization, use NTP or just socket?
I am using a PC and a raspberry pi(both run Linux) to gather sensor data, raspberry pi gathers laser scan data, PC gathers image captured by camera. I must synchronize time for these two machines. I ...
0
votes
1answer
23 views
Using corrected time in the “attribution” variable of mutt?
I receive quite a few email messages displaying UTC time within the "Date:" header.
I found the following perl script by user hyperair, very useful to display
a new header "Local-Date" for incoming ...
1
vote
1answer
34 views
date: Getting next certain hour
I want to get a date-time string in the future, for example I always want to get the next time of 9:00 am.
I know the string formats like "tomorrow" or "next day" to get a certain date-time string. ...
13
votes
4answers
5k views
Why is scp so slow and how to make it faster?
I'm trying to copy a batch of files with scp but it is very slow. This is an example with 10 files:
$ time scp cap_* user@host:~/dir
cap_20151023T113018_704979707.png 100% 413KB 413.2KB/s 00:00 ...
5
votes
3answers
371 views
Unix epoch in milliseconds
I'm prepending the Unix epoch with "nanosecond" precision into output of my command as below:
$ command | while read line; do d=`date +%s%N`; echo $d $line; done > file
I looked around to find ...
2
votes
0answers
48 views
What hardware support is needed for linux to do `gettimeofday` / `clock_gettime` in userspace using `hped`?
On reasonably modern systems Linux can service "system" calls like gettimeofday and clock_gettime entirely in userspace through the linux-vdso.so (or linux-gate.so) virtual library, so it does not ...
1
vote
2answers
61 views
Embedded Debian-Linux, no Timezone
We have a platform with Embedded-Debian-Linux as OS which will be distributed worldwide. We have a Battery-Backed RTC which should be used as system time.
We do not want to have any timezone or any ...
0
votes
2answers
89 views
Does ntpd have a default driftfile?
I have an embedded Linux with busybox's ntpd. My ntpd.conf is
tinker panic 0
server pool.ntp.org iburst
server 0.pool.ntp.org iburst
server 1.pool.ntp.org iburst
restrict default kod nomodify notrap ...
0
votes
0answers
54 views
issues with acpi-cpufreq and frequency scaling
I am using the Ubuntu distribution on Intel(R) Core(TM) i7-2760QM CPU @ 2.40GHz with Kernel version: 3.14.5.
I deactivated the intel_pstate driver and activated the acpi-cpufreq driver with userspace ...
6
votes
1answer
49 views
GNU find -[cma]time option and daylight saving time
In the GNU find man, you can read this about the -atime option:
-atime n
File was last accessed n*24 hours ago. When find figures out how many 24-hour periods ago the file was last ...
0
votes
1answer
45 views
Issues with storing an echo of a date conversion into a string variable inunix
Apologies but this question comes from a question previously raised: How can I convert a local date-time into UTC date-time? Toby has been absolutely great helping me with some conversion string-->BST ...
2
votes
1answer
247 views
Checking how long a user has been logged in
Is it possible to check for how long a user has been logged in? Or when the user logged in on an Unix/Linux system?
I logged in as another user on my system a while ago and I would like to now how ...
2
votes
3answers
50 views
Different 'time's called in similar environments in bash
I was told that people using bash will have to differentiate between the shell-builtin time and /usr/bin/time ( time(1) ). I had to time a program and also had to find ways to automate input, using ...
0
votes
2answers
45 views
Why I can't use the time command in verbose mode without specifying the whole command path?
Given that...
~$ which time
time is a shell keyword
time is /usr/bin/time
Why this works?
~$ /usr/bin/time --verbose ./some_script.sh
Command being timed: "./some_script.sh"
User time (seconds): ...
0
votes
1answer
231 views
How do I run a batch file at a specific time?
I have tried using the batch and at commands with no luck. I have a batch file in a location, lets say "$DD/batchfile.batch". Here is what I have tried.
batch -f $DD/batchfile.batch 10:00 today
at -f ...
2
votes
1answer
394 views
/usr/bin/time command -v not working
I know many questions have been asked/answered about the time command, but mine still seems to be not working. I have been doing like everyone suggests, and using /usr/bin/time, which seems to work, ...
2
votes
1answer
115 views
Is it possible to read PVclock from user space?
Is it possible to read clocksource xen or kvmclock using some user space tool?
Referring to /sys/devices/system/clocksource/clocksource0/current_clocksource. Reading the actual value of the pvclock.
...
1
vote
0answers
39 views
date/time setting does not work after unplugging power adapter or sudden power cut
For some reason, I want to configure the date/time in my Linux (CentOS 6.5) to be different from the REAL date/time, but the setting won't work if I turn my computer(desktop not laptop if this ...
2
votes
1answer
120 views
Time is not synchronized in Linux VM
I am using one Linux VM through VNC viewer from my Windows machine.
What I am seeing is that time between two is not synchronized. It seems that the VM is about 5 minutes delayed from Windows (windows ...
0
votes
2answers
48 views
Timing start up time for app launched via terminal command
I'd like to see how long it takes a certain app to fully start.
Is there a way to do this launching the app via terminal using some command?
1
vote
2answers
626 views
How to find out last run time of shell script?
I am trying to find out at what time the shell script ran last time within the shell script.
I tried:
ls -laru
ls -lart
but all these commands give me the last modified time and last accessed ...
1
vote
1answer
107 views
Why is the localtime reset to the default timezone?
I use the following commands to set the timezone on our Amazon Linux (Centos) server:
ls -al /etc/localtime
-rw-r--r-- 1 root root 118 25 dec 2012 /etc/localtime
sudo mv /etc/localtime ...
2
votes
1answer
91 views
Stable timing for shell scripts?
The run times of scripts vary quite much.
I would like to find similar time -function as Matlab's timeit, described here.
For instance, I am evaluating these commands here about counting quickly ...
1
vote
1answer
75 views
install date time picker on ubuntu server [closed]
I've recently created a kiosk which uses openbox and xorg in order to be able to show the browser. Is there also a way that I can run some command in the server and it will open a graphical date and ...
0
votes
1answer
46 views
How to redirect the time a task takes to complete into a log file, given that such task is already redirecting?
I have a shell script running a python task, whose stdout is being redirected to a log file:
python script.py >> log.txt
I wish to also log the time this task takes to complete, into the same ...
0
votes
1answer
122 views
set my system date & time via terminal
I don't why a + sign appears in the my program:
<ns1:ST>2015-05-23T18:00:00+04:00</ns1:ST>
<ns1:ET>2015-05-23T18:15:00+04:00</ns1:ET>
this is when I run the program in my ...
5
votes
5answers
4k views
How to get system time with microsecond Resolution
I want to know current system time with microsecond Resolution.
date +%s returns Time in seconds since epoch(1-1-1970). How can I get time in microseconds Resolution. How much delay is in querying ...
