This file is indexed.

/etc/texmf/hyphen.d/10texlive-lang-portuguese.cnf is in texlive-lang-portuguese 2009-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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% 10texlive-lang-portuguese.cnf
% You can change/add entries to this file and changes will be preserved
% over upgrades, even if you have removed the main package prior
% (not if you purged it). You should leave the following pseudo comment
% present in the file!
% -_- DebPkgProvidedMaps -_-
% 
name=portuguese file=loadhyph-pt.tex lefthyphenmin=2 righthyphenmin=3 synonyms=portuges