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doubt in sed

 
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Top Forums UNIX for Dummies Questions & Answers doubt in sed
# 1  
Old 08-03-2005
doubt in sed
hi all,

i have a variable exported as

VAR=ATTRIB

then tried with,
echo "tt" | sed 's/^/$VAR/'

expected result as
ttATTRIB

but obtained only,
$VARtt

i could nt get where i am wrong.

Thanks.
# 2  
Old 08-03-2005
echo "tt" | sed "s/$/$VAR/"
# 3  
Old 08-03-2005
Thanks,

I had already tried the very same thing that u had provided

echo "tt" | sed 's/$/$VAR/'

ended in vain.

But,
echo "tt" | sed "s/$/$VAR/"

came up with an answer.

Could you please help me with difference between ' and " in sed
# 4  
Old 08-03-2005
This has got nothing to do with 'sed', but rather with the surrounding shell expanding [double-quotes] / or not expanding [single-quotes] the "quoted" variable.

Do 'man ksh' and search for 'Quoting'
 
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