Touch -d forms

[Dazed_75]

Aaah, that looks like the answer.  I  just woke up from a nap and will go
try it.  I already knew part of it but when I saw the -r option in the man
page I really was not sure how to use it.  Your example makes it clear.  I
was already planning to mv the needed files to their own directory, process
them and mv them back which makes thing easier as you said.

Thanks again MM,
Larry


On Sat, Mar 30, 2013 at 1:45 AM, Matrix Mole <matrixm at gmail.com> wrote:

> Remember that touch will update the file relative to "now" instead of the
> existing date stamp on the file. Also, the -d option to touch can take the
> exact same information as the -d option for the date command. The -r option
> will make touch work relevant to the existing time stamp of the file. So,
> what you want should just be this 'touch -r file -d "+14 hours" file' as
> thus:
>
> $ ls -l test; touch -r test -d "+14 hours" test; ls -l test
> -rw-r--r-- 1 matrixm matrixm 0 Mar 27 04:17 test
> -rw-r--r-- 1 matrixm matrixm 0 Mar 27 18:17 test
>
> The -r option requires a filename to operate against (I discovered this
> during my testing while writing this up), so you need to list the file
> twice. You should be able to use a for loop, replacing both calls to the
> filename with a variable instead to quickly do all of the files, just be
> careful of your regex so that it doesn't accidentally catch files with the
> correct timestamp already (I always merely output the resulting files of a
> regex with an echo command before continuing writing a file modification
> loop). Unless, that is, you have the files that need the timestamp modified
> in their own directory. If that's the case, then you could do:
>
> for FILE in filestobemodified/*; do ls -l $FILE; touch -r $FILE -d '+14
> hours' $FILE; ls -l $FILE; done
>
> I would suggest holding off on running that one liner until you know for
> certain that the touch command with the -r and -d options will give you the
> result you want.
>
>
> On Sat, Mar 30, 2013 at 12:54 AM, Dazed_75 <lthielster at gmail.com> wrote:
>
>>
>>
>>
>> On Fri, Mar 29, 2013 at 4:42 PM, der.hans <PLUGd at lufthans.com> wrote:
>>
>>> Am 29. Mar, 2013 schwätzte Dazed_75 so:
>>>
>>> moin moin,
>>>
>>>
>>>  Looking to change some file dares to 14 hours later than the current
>>>> file
>>>> date/time stamps (they are NOT all the same).  I was thinking some form
>>>> of
>>>> the -d option would work but nothing I have tried works-
>>>>
>>>
>>> $ date; touch -d "$( date -d "+14 hours" +%Y%b%d )" /tmp/fred; ls -l
>>> /tmp/fred Fr 29. Mär 16:57:45 MST 2013
>>> -rw-r--r-- 1 lufthans lufthans 0 2013-03-30 01:13 /tmp/fred
>>>
>>> The "+14 hours" only works with GNU date, but that's what we get on
>>> GNU/Linux. BSD date really didn't like it :).
>>>
>>> ciao,
>>>
>>> der.hans
>>>
>>
>> This is close but not quite.  Maybe I could have explained it better.  I
>> have taken a LOT if video clips here in Thailand.  Unfortunately, the
>> camera clock was still set for Arizona time until several days into the
>> trip.  Now that I have fixed that I want to re-timestamp the first 100 or
>> so to have the timestamp adjusted +14 hours.  Here is what I get from
>> der.Hans' script:
>>
>>     larry at sunfish:~/tempwork$ ls -l target; date; touch -d "$( date -d
>> "+14 hours" +%Y%b%d )" target; ls -l target
>>     -rw-rw-r-- 1 larry larry 0 Mar 24 18:18 target
>>     Fri Mar 29 23:55:49 MST 2013
>>     touch: invalid date format `2013Mar30'
>>     -rw-rw-r-- 1 larry larry 0 Mar 24 18:18 target
>>     larry at sunfish:~/tempwork$
>>
>>
>> I can fix the date format I believe, but the target's timestamp should
>> end up being Mar 25 08:18, not Mar 30 13:55.  The reason I want a script or
>> compound command to do it is so i don't have to figure out the +14 hours
>> 100+ times and issue 100+ touch commands.
>>
>> Thanks, I hope I can get the timestamp extracted to a variable and use
>> that to replace the date command (if I don't fall asleep first :-)
>>
>> Larry
>>
>>
>>
>>
>>>  --
>>> #  http://www.LuftHans.com/        http://www.LuftHans.com/**Classes/<http://www.LuftHans.com/Classes/>
>>> #  Free, Libre, and Open Source enthusiasts are collaborators. Maybe
>>> we're
>>> #  involved for slightly different reasons, but in the end, we're all
>>> #  essentially trying to go the same direction. -- der.hans, 2012Jan25
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>>>
>>
>>
>>
>> --
>> Dazed_75 a.k.a. Larry
>>
>> Please protect my address like I protect yours. When sending messages to
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>>
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>
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-- 
Dazed_75 a.k.a. Larry

Please protect my address like I protect yours. When sending messages to
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