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Date: Fri, 16 Jan 2004 18:37:38 -0800 (PST)
Message-Id: <200401170237.i0H2bcb3049359@freefall.freebsd.org>
From: Jean-Marc Zucconi <jmz@dalai-zebu.org>
To: Brett Glass <brett@lariat.org>
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Subject: Re: General UNIX puzzle
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>>>>> Brett Glass writes:

 > I was asked a good question today about how to do some simple tasks using 
 > standard UNIX tools, and am curious what answers people on the list might 
 > come up with.

 > What are the simplest, most efficient ways to:

 > 1) Delete the Nth line from a text file?

sed -e Nd <file

 > 2) Insert a specified line in a file after the Nth line, leaving the rest 
 > of the text the same?
 sed -e 'Na\
line of text' <file

 > 3) Delete the first line containing a particular string?

awk '{if (/string/ && i==0) i++; else print $0}'<file

 > 4) Insert a specified line after the first line containing a particular 
 > string, leaving the rest of the file the same?

You can infer it by yourself after 3)


Jean-Marc

-- 
Jean-Marc Zucconi -- PGP Key: finger jmz@FreeBSD.org [KeyID: 400B38E9]