sed not replacing

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# 1  
Old 10-10-2013
sed not replacing

Data not replacing using sed,please check below.
sed -e s/\${Search_value}/\${Replace_value}/g intrepid_sps_val.parm

# 2  
Old 10-10-2013
Use double quote :

sed "s/$old/$new/g" infile

$ old=" test"
$ new="n example"
$ echo 'this is a test for kata'
this is a test for kata
$ echo 'this is a test for kata' | sed "s/$old/$new/"
this is an example for kata

# 3  
Old 10-10-2013
You may need to escape your variable assignments as e.g. replace_value will hold your PID plus the string "dbconn_target".
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