string replacing

priya_9patil · #1 (**permalink**) 11-03-2006

hii,
i need a unix command which replaces all occurrences of a substring within a string with another substring.
My solution:
string="plalstalplal"
sub1="al"
sub2="mlkl"
echo sed 's/$s2/$s3/g' < s1 > p
i want to know how to read the variables s2 and s3..
thaks a lot
bye

Manish Jha · #2 (**permalink**) 11-03-2006

echo $string | sed "s/$sub1/$sub2/g"

single quote doesn't allow varible sto be parsed.

--Manish

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