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echo & sed problems

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# 1  
Old 04-15-2011
echo & sed problems
I need a script to to instert the following line into my postfix master.cf file:
Code:
      flags=Rq user=filter argv=/etc/postfix/disclaimer -f ${sender} -- ${recipient}

if I use echo I get the line truncated:
Code:
:~ echo       flags=Rq user=filter argv=/etc/postfix/disclaimer -f ${sender} -- ${recipient}
flags=Rq user=filter argv=/etc/postfix/disclaimer -f --

I guess it's the $ characters, so I tried sed instead but get this error:
Code:
:~ sed 's/dfilt     unix    -       n       n       -       -       pipe.*/& \n        flags=Rq user=filter argv=/etc/postfix/disclaimer -f/' /etc/postfix/master.cf2 > /etc/postfix/temp_file
sed: -e expression #1, char 108: unknown option to `s'

either option would work as this just needs to added at the bottom of the file. Must be simpleSmilie

Thankyou
# 2  
Old 04-15-2011
Place the entire string between single quotes (').
# 3  
Old 04-16-2011
Thanks, works great for echo. Just for my own benefit, how do I make it work with sed (as this is generally more useful)?
Smilie
# 4  
Old 04-16-2011
you just need to escape the "/" in your new string using "\".
Code:
sed 's/dfilt     unix    -       n       n       -       -       pipe.*/&\n        flags=Rq user=filter argv=\/etc\/postfix\/disclaimer -f/' file > output

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