リファラ集計
open IN, '<', '/apache/logs/access.log';
my%ref_cnt;foreach my$log(<IN>){$log=~m/^.*? .*? .*?\[.*?\] ".*?" [0-9]{3} .+ "(.*?)" ".*?"/;$ref_cnt{$1}++;}
my@keys=sort{$ref_cnt{$b}<=>$ref_cnt{$a}}keys%ref_cnt;for my$key(@keys){print$ref_cnt{$key}.":".$key."\n";}