[ale] sed head scratcher

[Al Snow]

cat /etc/hosts | awk '{ print $1, tolower($2), $3 }' 

Thanks,
Al Snow

> Date: Tue, 4 Aug 2009 14:05:34 -0400
> From: jim.kinney at gmail.com
> To: ale at ale.org
> Subject: [ale] sed head scratcher
> 
> breakout the greybeards....
> 
> 
> I have a pile of text lines that need to have a certain portion
> transposed from upper case (windows dweebs did the hostnames) to lower
> case.
> 
> So many lines like:
> 
> 192.168.0.2 MACHINE102
> 192.168.3.4  MACHINE304 FredsBox
> 10.0.2.3   MACHINE599  TestingSystemB
> etc
> 
> So varying IP address then varying spaces then upper case name with
> digits then varying spaces and sometimes followed by other name with
> mixed case.
> 
> I want to ONLY lower case the names after the IP address, not anything
> else in the line.
> 
> Here's what I have so far:
> 
> cat /etc/hosts | sed '/ [A-Z]{7}[0-9]{1,3}/ y/[A-Z]/[a-z]/'
> 
> seems like it should work but it only replaces the 'A' with 'a' and it
> does it anywhere in the line.
> 
> So I'm pulling info from http://www.grymoire.com/Unix/Sed.html#uh-49
> and it talks about second word in this won't work unless I use
> multi-line editing.
> 
> But multi-line editing makes NO SENSE in this context!!
> 
> I could have probably already solved this problem using a different
> method/language/beer style but at this point I'm totally geeked out on
> this and am being stubborn.
> 
> I appreciate any sed solutions to this.
> 
> -- 
> -- 
> James P. Kinney III
> Actively in pursuit of Life, Liberty and Happiness
> _______________________________________________
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> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale

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