try this and let me know
#i just considered this is input file
partnm_1 fdfg
prlot dfg
test line
prwafer df
prbin dsdg
sspec dgdfg
fab dfgdfgg
partnm_2 sdgdf
sspec dfgdg
fab dfgdf
partnm_3 dfsd
sould not print
dont prnt
this is wrong
this is the perl part..let mw know if its not working
open($in,"file.txt") || die "file cannot be opened..$!";
@arr =<$in>;
if(@arr1=grep/(partnm_1|prlot|prwafer|prbin|sspec|fab|partnm_2|sspec|f
+ab|partnm_3)/,@arr){
print "@arr1";
}
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