Re: a two-level 'sort' question
From: Bill Seivert (seivert_at_pcisys.net)
Date: 03/26/05
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Date: Fri, 25 Mar 2005 19:31:23 -0700
Barry Margolin wrote:
> In article <1111785861.926694.303320@l41g2000cwc.googlegroups.com>,
> subPlanck@excite.com wrote:
>
>
>>I'm stuck trying to sort a long list of files in the form:
>>
>>Feb 24 13:50 060399_20a08.124
>>Feb 22 12:06 060399_20a09.035
>>Feb 22 12:06 060399_20a09.034
>>
>>whereby the entries are first sorted/grouped by
>>sort -t_ -d -k 2.1,2.5
>>and each block is sorted in an ascending order by date.
>>
>>man sort gives the following example to sort
>> 30 December
>> 23 MAY
>> 25 June
>> 10 June
>>sort -k 2M -k 1n
>>but I want to keep sorted blocks after the undersore as priority
>>blocks.
>>
>>The way I see it, the problem is in having to switch filed separators,
>>an underscore and space, in the same sort expresasion. Can it be done?
>>
>>I'd appreciate any suggestions, because none of my attempts have been
>>successful.
>
>
> Use -k 1.1,1,12 to specify the second field to be just the 12 characters
> containing the date and time.
>
But that will sort April and August in front of February.
Try:
sort -t_ -d -k 2.1,2.5 -k 1.1M,1.3 -k 1.5n,1.6 -k 1.7n,1.8 -k 1.10n,1.11
-k 1.14n,1.19
Bill Seivert
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