timestamp is used for questions that are about data specifying seconds since the epoch (19700101T00:00:00) or possible some other standard, and also for (date) and time information in filenames.

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2answers
48 views

How can I use Awk to convert a unix timestamp to human readable when doing a Tail -f logfile?

I'm currently doing a tail -f mysql.log and also have it color coded. But how would I use awk to convert the unix timestamps to human readable format? tail -f /var/lib/mysql/mysql-slow.log | awk ...
3
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1answer
47 views

UNIX Seconds, TAI (SI) Seconds, Leap Seconds, and Real-World Code

I've read a lot about UNIX Time lately, most of it incoherent, much of it contradictory. I am trying to reconcile conversions between UNIX Time (hereafter, for simplicity, UXT), TAI, and UTC, and to ...
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1answer
34 views

command /opt/bin/date --date '-15 minutes 2016-04-27T14:14:47' producing result many hours before stated time

I'm using the following command in an attempt to work out the time 15 minutes before the timestamp: /opt/bin/date --date "-15 minutes 2016-04-28T16:58:55" '+%Y-%m-%dT%H:%I:%S' The problem is the ...
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1answer
28 views

Correct syntax for inputting date variable into date calculation code

In my script, the following code successfully produces a timestamp variable for $n in the format 2016-04-28T15:47:48 for n in $(perl parsetime.pl | sed "s/.....$//") do echo $n result is: ...
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1answer
29 views

Code to calculate 15/30 minutes before specified timestamp (GMT) in ISO 8601 format

I am working with a timestamp which is in the following format which I am told is know as ISO 8601 : 2016-04-27T14:14:47.836Z I would like to be able to calculate the timestamp both 15 minutes and ...
2
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1answer
27 views

How do I modify a file without updating the modification time? [duplicate]

Sometimes I want to make a minor edit to a text file (e.g., fix a typo), but I want to keep its modification time unchanged. (Motivation: modtime is useful for listing directories in chronological ...
3
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2answers
73 views

Changing a file's modified date based on date in file name

I have a directory full of photos with file names in this format: IMG-20160305-WA0001.jpg. The date taken is obviously in the file title. Unfortunately the date modified on all files is today. I ...
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3answers
47 views

add timestamps to recorded session via “script” command

In my .bash_profile I have script -a -t 0 session.log which automatically records all terminal input/output into the session.log file. I know this command comes with an optional flag to record the ...
0
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1answer
25 views

Change last edited date [duplicate]

How can I change the last edited date of a file? There doesn't seem to be anything like: chlastediteddate 12/7/12 file What command can do this? Is there a way to do this without changing what the ...
3
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3answers
54 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 ...
2
votes
3answers
100 views

How to sort files in Bash with ddmmyy timestamps in name

I have a series of files with names of the form "foo.date.bar" where "date" is a six digit field such as 310715. So for example foo.310715.bar foo.260815.bar foo.110815.bar foo.040815.bar I would ...
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0answers
26 views

find and copy files change the modified date to 1980-1-1

I use command to find and copy files in cygwin in windows . My command is find -name '*.docx' -exec cp -p -t /word {} + however , when the files is copied to destination folder, I can see the ...
3
votes
4answers
132 views

How do I extract a long listing field?

I want to extract the access day of a file in a shell script. I tried by writing the following script but it doesn't work. When I echo accessday, the output is "staff". file=$1 accessday=$(ls -lu ...
4
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1answer
159 views

Piping into moreutils' ts with nanosecond precision?

On this system: $ cat /etc/issue Ubuntu 14.04.4 LTS \n \l $ uname -a Linux mypc 3.19.0-56-generic #62~14.04.1-Ubuntu SMP Fri Mar 11 11:03:33 UTC 2016 i686 i686 i686 GNU/Linux $ apt-show-versions -r ...
1
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1answer
58 views

how to log command start time and command end time in txt file using cygwin

I can save and view the cygwin console output (stdout and stderr) using the following command, python command.py 2>&1 | tee -a outFile.txt// Note -a is for appending since I have different ...
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5answers
66 views

Remove the latest modified file

I have created two files: sample.txt and sample.txt  (the second file contains some hidden characters, e.g. a space). How can I remove the latest modified file? I'm using Linux.
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2answers
52 views

Create directory named from file modification time

I want to create directory name from a file's modification time. For example, if the file creation or modification time is 03/17/2016 18:00:00 then I want to create a directory named 1703206. I'm ...
4
votes
3answers
109 views

UTC vs. localtime has an offset of about 25 seconds

I have compared this in different systems, but only get this behavior in an embedded system running Arago linux. I use the date command from BusyBox v.1.13.2 I executed this two commands ...
1
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2answers
71 views

Why doesn't unix filesystem store creation time of a file? [duplicate]

Is there any historic reason? Stat stores last accessed time, last modified time and last changed time , but not the creation time! Isn't that important information. I can't understand why the ...
1
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1answer
84 views

Find tar.gz files in a folder which are older than 20 days and delete

I have a backup script which creates a backup (in tar.gz) of my /var/www-folder in my CIFS-mount-folder. To delete old backups which just waste memory I have created a cronjob that checks every day ...
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votes
3answers
71 views

Move files based on filename into directory Year/Month/Day

I have files in the format YYYY_MM_DD_HH:MM:SS.swf that dump into a folder /home/user/dump/ I want to move these files into a new directory tree /home/user/save/year/month/day/ based on the ...
0
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2answers
139 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
1
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1answer
50 views

Access directory by modification date

Is there a way to refer to a directory by its modification date, like cd ~/$newest/subdirectory? I know that I could (and shouldn't?) parse ls, and I currently just use a hacky script that generates ...
3
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2answers
54 views

How to copy modified files while preserving folder structure

I have made many changes to files in my PHP project and I want to push those changes to our server via FileZilla FTP. Rather than push all of the files, I would like to find only the files that have ...
6
votes
1answer
541 views

Check last time .sh file used

When you run ./myscript.sh is that considered as "access" time? I need to know the last time a script was run, but I'm not sure if this counts as mtime, ctime or atime (differences described here).
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0answers
45 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 ...
1
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1answer
42 views

How do I get an acceptable last modified timestamp for my Jekyll site using a shell script?

I would like to be able to provide last modified timestamps to my Jekyll posts and pages using a shell script. The problem is that I do not know how to automatically generate an acceptable timestamp. ...
0
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1answer
74 views

add 10 days for UNIX timestamps output

I've file contain many of epoch / UNIX timestamps need to add for example +10 days for output date so then I will get new date and I've create bash script with date command but seems doesn't work ...
1
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1answer
32 views

What does when the file's status was last changed mean?

I'm reading about find and for one of the tests (-cnewer file) it reads: File's status was last changed more recently than file was modified. What is the file's status? It's obviously a date, ...
1
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1answer
69 views

ls -lu does not give last access time

The manpage of ls says: -u with -lt: sort by, and show, access time; with -l: show access time and sort by name; otherwise: sort by access time but that doesn't seem to work: ...
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2answers
154 views

Full file date (without GNU utilities)

I am trying to obtain the full date (created or modified) of a particular file for passing to another program. I have tried variations of options with the ls command but none provide a full date for ...
3
votes
1answer
117 views

How do I show UTC time in the i3status bar?

In my ~/.i3status.conf I have order += "tztime local" order += "tztime utc" #... tztime local { format = "%Y-%-m-%d %I:%M:%S" } tztime utc { format = "%H:%M:%S" } but my status bar shows ...
1
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1answer
48 views

How can I determine last access of a symbolic link without updating it?

Over time, a once tidy directory structure is changed and extended in unanticipated ways on a needs bases. After enough years go by it becomes 'a mess'. Of course, I had nothing to do with it. :-) ...
1
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1answer
62 views

Find oldest directory name on a remote server?

I'm writing a backup script of sorts. My backup server contains 3 directories (named by date in the MM-DD-YYYY format) For example: 12-22-2015 12-28-2015 12-29-2015 Im writing my backup script ...
2
votes
1answer
40 views

Change a file's access-, change- and modify-dates to same past date

For a utility I'm developing it would be expedient if I could set all three the named dates associated with the files in some directory to some date in the past. I know I can use touch to set the ...
3
votes
1answer
326 views

I want to list all the files in my Linux server which are older than Dec 31, 2014

I want to list all the Linux files in a directory and sub directories which are older than 31 Dec 2014. Please help me out for this.
1
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2answers
129 views

Merging log files with different timestamp formats

I have two types of log files Standard Syslog format The timestamp looks as below 5:2015 Dec 21 07:35:06:ABC:foo1:1559: common.c:946:Enabling filter 6:2015 Dec 21 07:35:08:ABC:bar1:1461: ...
4
votes
1answer
459 views

Copy file creation date to metadata in ffmpeg

I would like to copy the file creation date of an mp4 file into the file's metadata. I'm pretty sure this can be done with ffmpeg and some nifty Linux commands.
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1answer
39 views

Listing of files between two timestamp

I want to list down the files between two timestamp. But I can not use newer or newermt command as it doesn't support these tokens. Is there any other way to achieve this? Else I have to write too ...
1
vote
1answer
176 views

I am trying to fetch the logs for last five minutes through a script

I have a output log file which will be continuously appended and I am planning to have a script (runs for every 5 min) to retrieve the last 5 min data from of the output log. Sample data from the ...
1
vote
1answer
37 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. ...
0
votes
1answer
56 views

Is ctime on linux always greater or equal as mtime?

I'm trying to clear out how the timestamps of a file on linux work. In this answer is stated: Modify - the last time the file was modified (content has been modified) Change - the last time ...
0
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0answers
76 views

Bash prompt time is not always updating

Before I start, this is not a question about how to customize PS1. I have already customized mine and I'm quite happy with it. I usually work in a remote server with SuperPuTTY, which allows me to ...
4
votes
4answers
212 views

Delete all but the most recent n file for each group of files that share the same prefix in a directory

My question is a bit different from some older questions simply asking for "deleting all but the most recent n files in a directory". I have a directory that contains different 'groups' of files ...
5
votes
1answer
68 views

what is a resolution of jiffie in Linux Kernel

What is a resolution of jiffie in Linux Kernel? according to current timer source (cat /sys/devices/system/clocksource/clocksource0/current_clocksource), Linux uses TSC and has nanosecond resolution ...
3
votes
3answers
541 views

Delete all files in a folder except the last (most recent) 20 [duplicate]

I want to remove all the files from different directories, and want to keep only latest files 20 files. is this the correct command to do this? ls -t1 /mnt/dwh/ftp/dwh_ftp_cbs/ARLOGS/ | tail -n +22 | ...
11
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5answers
721 views

Test if File was Modified After Date in File Name

I have a files named with YYYYMMDD in the file name, such as file-name-20151002.txt I want to determine if this file was modified after 2015-10-02. Notes: I can do this by looking at the output ...
5
votes
3answers
400 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 ...
0
votes
1answer
77 views

how to get crtime of a file in an ext4 partition as a single number or string

I am seeking a method of getting the crtime of a file in hexadecimal or decimal in unix epoch seconds instead of in a date and clock format and with no additional output. This command adds additional ...
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0answers
27 views

Getting file crtime under ext4 file system [duplicate]

I'm trying to display a file is creation time. I've been searching and I found out that under ext4 file systems this is something indeed possible to get and it's stored as crtime. As you can see in ...