Once you've decided what it is you need to comment out, then simply use;

  s/^/#/
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So, you could use something like;

  while (<>) {
    if (/Alias/ .. /\/Directory/) {
      s/^/#/;
    }
    print OUTPUT;
  }
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That is, if your intent is to comment out all lines starting from the one matching /Alias/ to the one matching /\/Directory/.

See the perlfunc man page, under s/// for how to use s///, the perlretut and/or perlrequick man page for how to write regular expressions, and the perlop man page for how the .. "flip-flop" operator works.

$h=$ENV{HOME};my@q=split/\n\n/,`cat $h/.quotes`;$s="$h/."
."signature";$t=`cat $s`;print$t,"\n",$q[rand($#q)],"\n";
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