On Tue, 27 Dec 2011 14:20:02 +0100, lina scribbled:
> On Tuesday 27,December,2011 08:57 PM, lina wrote:
>> Hi,
>>
>> I have two questions, wish to get advice,
>>
>> Question 1:
>>
>> For a series of files:
>>
>> cat a_*.o* | grep "WARNING"
>>
>> some file like a_1.o12 has WARNING, but others does not have WARNING
>>
>> How can I let grep returns the filename?
>
> I wrote a very-low-level and not-work-as-expected one,
>
> #!/bin/sh
>
> for filename in *.o*
>
> do
> #echo $filename
> a= cat $filename | grep "WARNING"
> if [ a ]
> then
> echo $filename
> fi
>
> done
>
> Please give me some advice,
>
> Best regards,
>
>
>>
>> Question 2:
>>
>> ls . | xargs -i -t cp ./{} {}.bak
>>
>> How does xargs work,
>>
>> I checked google, :
>> -i : replace the string
>> -t print
>> but still lack well understanding,
>>
>> how those xargs organise things,
>>
>> and
>> $ ls .
>> a.txt b.txt
>>
>> above will give a.txt.bak b.txt.bak
>> ls | xargs -i cp ./{} {basename {}.bak} definitely not work,
>>
>>
>> Sorry I send it to debian list, I asked on another bash list, for two
>> days the second question, no one replied. I have much more faith in
>> this list.
>>
>> WIth all the best regards,
whoops, my bad (so focused on the -l)
its
$ grep -l "WARNING" *.o*
:(
--
>@<
Bill Dennen ieee1...@hotmail.com
Of all the things I've lost, I miss my mind the most ...
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