I don't know what Carton is, so just covering this:

Secondly, there are about 200 CGI scripts mostly in Perl, and each with a #!/usr/bin/perl shebang line

find ... -name '*.cgi' -type f \
   -exec perl -pe's{^#!.*?/perl}{#!/.../perl} if $. == 1' -i~ {} \;

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In reply to Re: How to run a legacy perl version smoothly from perlbrew & Carton by ikegami
in thread How to run a legacy perl version smoothly from perlbrew & Carton by chrestomanci

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