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Date:      Wed, 12 Mar 2003 11:10:29 +0100
From:      Dean Strik <dean@stack.nl>
To:        Kok Kok <cckok002000@yahoo.ca>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: sed to replace the words
Message-ID:  <20030312101029.GB27853@dragon.stack.nl>
In-Reply-To: <20030312061655.26510.qmail@web13305.mail.yahoo.com>
References:  <20030312061655.26510.qmail@web13305.mail.yahoo.com>

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Kok Kok wrote:
> Hi all
> 
> I have question how to replace words using sed
> 
> ./script 61.100 192.168
> 
> The script is 
> #!/bin/sh
> sed -e 's/$2/$1/g' file > newfile
> 
> The problem is 192.168 can't replace 61.100 in the
> newfile

The single quotes prevent interpolation, the $... are not treated as
variables by the shell. Use double quotes instead:

sed -e "s/$2/$1/g" file > newfile

-- 
Dean C. Strik             Eindhoven University of Technology
dean@stack.nl  |  dean@ipnet6.org  |  http://www.ipnet6.org/
"This isn't right. This isn't even wrong." -- Wolfgang Pauli

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