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Thank You!!! So I did not use your suggestion of using quotemeta (I haven't used it before, so I'm gonna go look it up), but I got my answer in the sample output you linked :) Here's my updated code that's working now. Apparently I just needed to preemptively escape the . in my search string. my $file = "foo.c"; $file =~ s/\./\\\./; `perl -p -l -i.bak -e "s/$file/$file,=SUM(B$x:B$y)/" sample.csv` Though probably I should look into Dean's suggestion as well. Any thoughts on which approach would have the fastest execution time out of these? In reply to Re^2: How to handle metacharacters in input file for Perl one-liner code
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