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perl -MFile::Find -e 'find(sub {my $f = $File::Find::name; print $f, " +\n" if -w $f && !-l $f}, "/")'
use File::Find::Rule::Permissions; my $user = @ARGV ? $ARGV[0] : $ENV{USER}; print $_,"\n" for File::Find::Rule::Permissions->file() ->permissions( user => $user, isWriteable => 1) ->in("/");