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perl -e "@list=(1..7);$counter=0; foreach $it (@list){if ($counter >= +3){print qq(\n\n);$counter = 0; redo}print qq($it\n); $counter++}" 1 ... 7
sub proces_no_more_than_50 { ... &proces_no_more_than_50($port,@addresses) if defined $addresses[0]; }