Date is a command line utility for printing or setting the date and time.

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6
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4answers
6k views

Renaming a bunch of files with date modified timestamp at the end of the filename?

So, say, I have a directory with a bunch of files like g.txt, where g.txt was last modified on, say, June 20, 2012. How would I batch-rename all of the files (like g.txt) with the last modified date ...
2
votes
4answers
10k views

First and last day of a month

Given two numbers, month and year, how can I compute the first and the last day of that month ? My goal is to output these three lines: month / year (month in textual form but that is trivial) for ...
6
votes
4answers
924 views

Date computations without GNU tools

I have to perform some date calculations and conversion in a shell script. For example computing the difference in day between a date formatted as Nov 28 20:27:19 2012 GMT and today. There are ...
2
votes
2answers
289 views

CentOS 5.6 live time feature without repeatedly executing date command

I am using CentOS 5.6, is there a way to view a "live" time, without constantly executing the date command? Constantly excuting the date command can be quite frustrating and repetitive when checking ...
2
votes
2answers
134 views

Is the system time correct when no date has been set?

If I was looking through a debian log file and I come across Jan 1st 1970 08:21:34 in a log, did the action happen at 08:21:34, just the correct date had not been set? Or if no date had been set is ...
1
vote
1answer
154 views

What does XST in the date command output mean?

When executing the date command (on CentOS), it gives me something like this: Thu May 10 20:15:07 XST 2012 My local time zone is CEST, which was at that moment 22:15:07, so the printed time ...
5
votes
1answer
1k views

Get “date” to understand a timestamp phrase of a different language

My web-scraping scripts have long enjoyed using date -d to read in human-formatted time and date stamps like "March 11, 1999" and convert to any other format I need via the -s parameter. How might I ...
6
votes
1answer
515 views

In KDE, how can I create a custom keyboard shortcut that prints the current date?

I often need to print the current date in lots of different programs. Right now, I always type it per hand which is error prone. I'm using KDE 4.8, and it has customisable keyboard shortcuts. For ...
1
vote
1answer
12k views

How can I fake sending -time when sending email with Mutt?

Suppose a student is two hours late in returning an assignment. Now the assignment needs to travel a long way in internet so there is a good excuse that it got lost in somewhere or got jammed (well ...
10
votes
2answers
614 views

What is a distro-agnostic way determine the OS install date?

I am on a CrunchBang machine and trying to write a script that needs to have the OS install date as a reference. I searched and found this command: ls -lct /etc | tail -1 | awk '{print $6, $7, $8}' ...
3
votes
2answers
2k views

UNIX move file name with sysdate

I want to make a script in Unix in which I have to move a file daily to a specific path. In order to avoid overlapping of the file, I want the file name along with the date. e.g. mv filename ...
6
votes
3answers
884 views

sort at jobs chronologically

Possibly a simple solution I misplaced. How can I get the output of atq sorted chronologically, so I can easily see who's due to run next? The man page for sort doesn't have anything built-in to ...
2
votes
5answers
595 views

Is it possible to reference the most recently modified file in a command line argument?

I frequently download PDF files with heinous numeric file names from my browser. These automatically go into ~/Downloads. Ideally I would like to just be able to open these files with: evince "the ...
4
votes
2answers
10k views

List of Recently Modified Files

How can I Get a list of all files modified , say 3 months ago. I checked this question but I was not able to apply it to my scenario. I am trying this now , it seems to be working , but I know there ...
3
votes
9answers
3k views

How to generate a year-quarter date from the command line?

I'm interested in outputting a representation of the current year-quarter, as well as the year-quarter for the previous month. If today is 2012 January 1st, I'd like to get 2012q1 and 2011q4 as ...
0
votes
1answer
268 views

Setting system/hardware clock under Debian

I have installed a system with a London timezone, instead of using Central European Time. The problem is, that hwclock says the time is 11:00, date says the time is 11:00. I have changed the timezone ...
22
votes
8answers
42k views

Quickly calculate date differences

I often want to make some quick date calculations, such as: What is the difference between these two dates? What is the date n weeks after this other date? I usually open a calendar and count the ...
2
votes
1answer
573 views

How to insert a first column to many files + how to convert unix time to normal time

There are many-many files in a directory that has e.x.: the following content: INPUT: root 1324711901 sshd 1272725792 And I'm searching for a solution how to convert the content of the ...
3
votes
6answers
5k views

Trying to set date on a Linux based machine from another machine

I am running busy box on an embedded platform. I would like to set the date on the box properly each time I reboot the hardware. I have no way to save the time persistently, so am reduced to setting ...
4
votes
2answers
2k views

/etc/shadow date of last password change—UTC or local time?

man 5 shadow gives the following description of the third field in each line: The date of the last password change, expressed as the number of days since Jan 1, 1970. The value 0 has a ...
5
votes
2answers
2k views

How to get 3 minutes future date?

I want to get the date 3 minutes on the future. For example, if "now" is 01-Jan-70 00:00:00 GMT I want to get 01-Jan-80 00:03:00 GMT How should I do it? I'm working with busybox linux.
2
votes
2answers
375 views

Padding day / time values to ensure 3 digit length

I have a script which renders timestamps in the format YYYY'DDD'TTT where Y = year, D = day out of 365 and T = time in 1000th's of the day: #!/bin/bash clear s=$(($(date +"%H*3600+%M*60+%S"))) ...
3
votes
1answer
117 views

Generate time as expression of 1/1000ths of the day

Completely new to bash and having trouble working out how to make the arithmetic work. I think this should be easy, it's just.. argh. I want to express the time of day in terms of 1/1000ths (ie, ...
5
votes
1answer
272 views

Remind syntax combining a weekly event with a time range

How should I write "Every Tuesday, Thursday, Friday after 2011 Sep 13, but before Sep 28, with reminder 1 day before event". Now I got REM Tue Thu Fri 13 Sep 2011 +1 UNTIL 28 Sep 2011 MSG Esem, but ...
9
votes
3answers
2k views

How to use the date command to find out what date “monday week 40” will be?

How can I use the date command to convert something like "monday week 40" into a ISO date? I am playing with something like this: date --date='monday week 40' +'%Y-%m-%d' And the date I'm ...
2
votes
3answers
4k views

How to feed the results of date command into grep to filter results of another command

I need to use the result of a formatted date command (date +"%m/%d") as the grep filter to filter the results of another command that will display alerts on a system so that I only see alerts from the ...
2
votes
1answer
1k views

Need help converting a string from a file into a date

I'm trying to read a string from a file and then convert it into a date but for some reason it's failing. I'm actually modifying a GeekTool Geeklet that's not working at the moment. It reads a file ...
8
votes
2answers
3k views

Is there a way to adjust the formatting of the date/time in the GNOME 3 login screen and desktop?

I'm specifically looking to change the formatting in two places: On the desktop, the date/time reads "Sat 21:05". I would like it to read "23-Jul-11 21:05" or "23 Jul 11 21:05". In other words, I ...
3
votes
1answer
546 views

bash: cd to the most recently modified child directory

Wondering if there's an easy and/or portable way to say "change to the most recently modified child directory." I can use ls and awk but there's probably a better way. cd $( ls -ltrd */ | tail -1 | ...
9
votes
2answers
1k views

How can I delete all files in a folder that haven't been accessed in a certain amount of time?

I'd like to run a nightly cron job that deletes all the files in a folder that haven't been accessed in a week or more. What is the most efficient way to do this in bash?
-1
votes
1answer
2k views

Sum of grep results

I need to output the sum of a grep results for a certain time, for now i hard coded the time grep but any help will be very much appreciated, my problem is i cant output the results on the script. If ...
3
votes
1answer
1k views

using system command in awk script

In an AWK script I am using a command system(date) to print the current date in a file but after this command is executed next line is also added implicitly. Is there any way in AWK to print ...
8
votes
4answers
705 views

Forcing an 'added' alias to every command

Is it possible to forcibly add a timing alias (for lack of a better way to phrase it) to every command in bash? For example, I would like to have a specific user who whenever a command is run, it is ...
4
votes
3answers
448 views

Setting linux time

$ date 042612492005 $ hwclock -w The code above shows how to set the system time, but how's the timestamp string generated in the first place?
2
votes
5answers
1k views

Highlight the current date in cal

I would like to highlight today's date in the output of the cal command. What is the best way? This is what I have so far: cal -m | grep -C6 --color "$(date +%e)" but it doesn't work for all cases ...
2
votes
3answers
2k views

How many minutes have passed since the Unix Epoch?

Sorry for the lame question How many minutes have passed since the Unix Epoch ? It should be January 1, 1970 ? Let's say approximately until 1 Jan 2011... 5 865 696 000 minutes ?
12
votes
4answers
17k views

How to list files sorted by modification date recursively (no stat command available!)

How can I get the list of all files under current directory along with their modification date and sorted by that date? Now I know how to achieve that with find, stat and sort, but for some weird ...
21
votes
4answers
21k views

last time file opened

Is it possible to get the time when file was opened last time and sort all files in a directory by those times?
8
votes
3answers
18k views

Getting all files that have been modified on a specific date

Is it possible to find all php files within a certain directory that have been modified on a certain date I'm using find /var/www/html/dir/ -mtime -28 | grep '\.php' to get files modified within ...
13
votes
4answers
7k views

How can I avoid “Run fsck manually” messages while allowing experimenting with system time changes?

I'm working with a system where we want to allow users to play around with the date and time if they want, and where reboots may happen arbitrarily. This is fine, except for one thing: if there's a ...
5
votes
3answers
1k views

Fast way to build a test file with every second listed in YYYY-mm-dd HH:MM:SS format

I want to create a large test file with lines containg dates listed by the second, but my method is taking inordinately long... (or at least, that's how it feels :) ... 43 minutes to create only ...
8
votes
6answers
8k views

date, get current 15 minute interval

Is there any way I can get the current 15 minute interval using the date command or similar ? e.g. something like date %Y.%m.%d %H:%M will give me 2011.02.22 10:19 , I need something that yields ...
9
votes
2answers
782 views

date - years prior to 1901 are treated as invalid

I have date (GNU coreutils) 7.1 installed on my system. If I try to check dates prior to 14-Dec-1901, I get an "invalid date" error. For example, $ date -d 1901-12-13 date: invalid date ...
4
votes
2answers
5k views

How to get elapsed time from two “text based” dates

I would like to know if there is a way to calculate the difference between two times in bash. I have two fields that are extracted from a log file: Start time: Feb 12 10:02:10 End time: Feb 12 ...
5
votes
3answers
2k views

Installation date of Ubuntu

How can I determine when Ubuntu was installed in my computer? There was a different question posted here, but none of them is helpful.
6
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1answer
3k views

Calculate the date from 1125 days ago on non-GNU systems?

On the Unix Bash commandline, I want to calculate the date from 1125 days ago using the base operating system (e.g. No Perl or Python). On systems running GNU Date, I can do something like this: ...
23
votes
5answers
33k views

How do I convert an epoch timestamp to a human readable format on the cli?

How do I convert an epoch timestamp to a human readable format on the cli? I think there's a way to do it with date but the syntax eludes me (other ways welcome).
16
votes
9answers
10k views

Tool in UNIX to subtract dates

Is there any tool in Solaris UNIX (so no GNU tool available) to subtract dates? I know that in Linux we have gawk that can subtract one date from another. But in Solaris the maximum we have is nawk ...
25
votes
10answers
4k views

Year 2038 problem

What is the likelihood of the Year 2038 issue being very problematic?
3
votes
1answer
1k views

rsync time comparison - what's the precision of the Modified times comparison

I'm doing some synching with rsync using: rsync --rLvv --times --size-only For my initial sync. My idea, now is to use: rsync --rLvv --times To synch files that have a new modified time. ...