title: Replace default perl on Ubuntu 16.04
body: <p>I got a huge project written on Perl, which contains many of scripts which starts with typical #!/usr/bin/perl</p>
  
  <p>For this project I need a custom-built Perl to be compiled from source.</p>
  
  <p>I tried just to replace /usr/bin/perl with my compiled one but OS becomes broken (for ex. module version mismatch etc).</p>
  
  <p>So is there any correct way to replace system perl with my own-built one or the easiest way would be to edit all tons of scripts and replace /usr/bin/perl with /usr/local/bin/perl or something like this?</p>