[aklug] Re: Tip of the Day

Quoting Shane Spencer <shane@bogomip.com>:

> On Sat, Mar 27, 2010 at 8:32 AM, Kenneth D Weinert
> <kenw@quarter-flash.com> wrote:
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>>
>> Christopher Howard wrote:
>>> Never pipe the output of your sed command straight back into the files
>>> you are processing. You lose a lot of source code that way. :]
>>
>> Ah, grasshopper - you have firmly grasped the pebble that has been
>> grasped by many before you :)
>>
>> And yes, this *is* the voice of experience talking. Not something I've
>> done in quite a while now, but the memory is still fresh.
>>
>
> I have a fun comment to this:
>
> I've done this a few times forgetting that the pipe/redirect is
> brought up before the commands that feed them, which is why that file
> suddenly doesn't have data. However append redirect is your buddy
> when you want to try to "sneak one" past the shell. TAKE THAT! - oh..
> and for larger files.. say more than 1k.. this will be an endless loop
> of pain.
>
> sed 's/this/that/g' infile >> infile
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Maybe the -i (dash eye) option is what is needed here?

Mike B.

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Received on Sat Mar 27 17:00:52 2010