[juneau-lug] Re: aliases

  • From: Tom Pittman <pittman@xxxxxxxxxxxxx>
  • To: juneau-lug@xxxxxxxxxxxxx
  • Date: Wed, 24 Nov 2010 13:22:29 -0900

On 11/24/2010 10:39 AM, James Zuelow wrote:
> ----Original Message----
> From: juneau-lug-bounce@xxxxxxxxxxxxx
> [mailto:juneau-lug-bounce@xxxxxxxxxxxxx] On Behalf Of James Zuelow
> Sent: Wednesday, November 24, 2010 10:32 AM To:
> 'juneau-lug@xxxxxxxxxxxxx' Subject: [juneau-lug] Re: aliases
>
>    
>> I edited it and cut off the last pipe with tail, and I find that the
>> grep -v and cut commands are just ignored.
>>
>>      
> Darn it, this is twice I've had to correct a message.  I had a typo in my 
> edit -- the grep and cut commands DO work in the alias, it is just the tail 
> command that doesn't.
>
> So again, I think the pipe works differently in a bash alias than it does 
> when you create one interactively.
>
> The problems in this thread have been with head and tail (which are really 
> the same thing) not seeing what it likes from the pipe.  So the output is 
> different when the pipe is in an alias somehow, breaking some programs -- 
> you'd have to dig into the bash internals to find out why.
>
> James Zuelow
> Network Specialist
> City and Borough of Juneau MIS
> (907) 586-0236------------------------------------
> The Juneau Linux Users Group -- http://www.juneau-lug.org
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>
>    
I think the problem with head and tail is that they are designed to read 
a file.  A directory is not a file.
-- 
Tom.


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