To get the date of the last sunday one could use date --date="last sun" for Linux and date -j -v-sun for BSD.
How is it done however if I do have week numbers (1 to 7) instead of strings? I could always use a case-statement to convert the numbers to strings, but I bet there is a better solution for this?!
Thanks for your help.
Use an array:
number=1
days=(zero sun mon tue wed thu fri sat)
date --date="last ${days[number]}"
Related
I have two timestamps in formats :
Timestamp 1 (Variable - RunStartDate): Thu May 3 14:12:54 CDT 2018
Timestamp 2 (Variable - RunEndDate): Thu May 3 18:11:46 CDT 2018
I want the difference of number of hours between these two timestamps in UNIX shell. (I.e. RunEndDate - RunStartDate in hours)
Please help, I am new to UNIX and it is throwing me errors when I just try to subtract the two.
You have a few options here, such as calling out to Perl or Python and using a date/time library to do the math for you. Another option is to use the date program to convert the dates to seconds, subtract the values, and then convert back to hours. Unfortunately, you can't do floating-point math in Bash, so we'll have to call out to a helper program to do that, too.
START=$(date -d "$RunStartDate" +"%s")
END=$(date -d "$RunEndDate" +"%s")
HOURS=$(bc -l <<< "($END - $START) / 3600")
Note that this will only work on GNU systems (e.g. Linux).
I have the following Unix timestamp: 1478698378000
And I'm trying to show this as a datetime in Ruby, e.g.
<%= Time.at(#timestamp).to_datetime %>
Which should be returning a date of: Wed, 09 Nov 2016 13:32:58 GMT but the above code actually returns a date of: 48828-02-01T13:26:40+00:00 Ignore formatting!
As you can see it thinks that timestamp is 2nd Feb 48828 13:26:40.
Why is the datetime coming out completely incorrect and the year so far into the future like that? Checking the timestamp on http://www.epochconverter.com/ reveals the timestamp to be correct, so it's Ruby that's returning it incorrectly.
Time.at expects seconds as an argument and your timestamp is an amount of milliseconds. See documentation on Time.at
Why won’t you check the unix timestamp correctness against “Fashion Week Magazine” or “Cosmopolitan” Site?
Unix timestamp is an amount of seconds lasted since 1970-01-01 UTC:
date --date='#1478698378000'
mar feb 1 14:26:40 CET 48828
BTW, dropping last three zeroes gives you back what you’ve expected:
date --date='#1478698378'
mié nov 9 14:32:58 CET 2016
I want the date format Thu Nov 3 17:21:08 2016 to be converted to Thursday, 3 November 2016 7:48:24 PM AEDT .
Actually, i want to achieve in converting the 12hrs time to 24hrs format using a shell script .
Thanks
I believe below command would help you to go ahead:
date +"%T"
I am using the ruby gem "Chronic" to parse four digit strings as DateTime objects. I am using time in military format (ie: "0800") which seems from the documentaion to be a valid format.
In most cases, Chronic parses time in this format correctly - however it always parses a four digit string beginning with "12" as 00:XX AM of the next day, never as 12:XX PM of the current day.
For example:
>> Chronic.parse("1234")
=> Thu Sep 17 00:34:00 -0600 2009
I see that if I put a colon between the hours and minutes I get the desired output:
>> Chronic.parse("12:34")
=> Wed Sep 16 12:34:00 -0600 2009
I am however wanting to pass the value without a colon, like this:
>> Chronic.parse("1234")
=> Wed Sep 16 12:34:00 -0600 2009
What string do I have to pass to the parser in order for Chronic to interpret "1234" as 12:34 PM of the current day?
I'm not certain, but it looks like it might be a bug. My guess is you're ending up in this corner of the code:
http://github.com/mojombo/chronic/commit/c7d9591acf5179345cbc916bd509c48acee8e744
In a terminal session I can use date -u to get
Mon Mar 16 03:34:39 2009 UTC
However, I'd like to include the offset. I'm modifying a TextMate tab trigger so that I can insert the full date including the local offset, in standard UTC format. I believe that would be in the following form:
Mon Mar 16 03:34:39 2009 UTC -0500
So, as you can see, I don't know how to get the timezone offset and combine that with formatted date results.
Try this:
echo `date -u` `date +%z`