doubt in sed

matrixmadhan · #1 (**permalink**) 08-03-2005

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.

vgersh99 · #2 (**permalink**) 08-03-2005

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

matrixmadhan · #3 (**permalink**) 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

vgersh99 · #4 (**permalink**) 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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