[aclug-L] sed question

[Wayne White <wwhite@xxxxxxxxxxxxx>]

I am trying to get sed to substitute the value of a  variable for 
another string. It doesn't seem to want to do it as it only 
substitutes "$vari" instead of the value of var.

Is it even possible to use a variable in sed like this? Is there
some special syntax required if it is possible. 

Here's what I've tried,

# Get current dynamic local IP address

vari= `tail /var/log/messages | grep local | awk '{ print $9 }'`

# Substitute it into a html file in place of last IP address

sed 's/209\.134\.90\.[0-9]*/$vari/' /temp/test.html > /temp/test2.html

This will insert "$vari" into the correct place in the html file,
but I need it to place the value of vari instead. No matter what I
put between the /  and   /, that is what it substitutes into the 
test2.html file. 

Some other things I've tried there:

        /{$vari}/
        / $vari /
        /{ $vari }/

and several others that I've forgotten. All result in the string 
between the /'s being substituted exactly.

The variable is correctly valued with the current IP address. I 
have also tried exporting it in the hopes that would let it work
id sed. No such luck.

Help!!!!!

Wayne

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Just allow a fragment of your life. . .
        to wander free.
                E.J.
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