1、概念：
- UV(Unique Visitor)：獨立訪客，將每個獨立上網電腦（以cookie為依據）視為一位訪客，一天之內（00:00-24:00），訪問您網站的訪客數量。一天之內相同cookie的訪問只被計算1次；
- PV（Page View）：訪問量,即頁面瀏覽量或者點擊量,用戶每次對網站的訪問均被記錄1次。用戶對同一頁面的多次訪問，訪問量值累計；
- 統計獨立IP：00:00-24:00內相同IP地址只被計算一次,做網站優化的朋友最關心這個；
2、日志輸出格式：
172.16.0.70 - - [03/Jan/2019:23:57:20 +0800] "GET / HTTP/1.1" 302 0 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
172.16.0.70 - - [03/Jan/2019:23:57:20 +0800] "GET /ljzx HTTP/1.1" 302 5 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
172.16.0.70 - - [03/Jan/2019:23:57:20 +0800] "GET /ljzx/ HTTP/1.1" 302 0 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
172.16.0.70 - - [03/Jan/2019:23:57:20 +0800] "GET /ljzx/logout HTTP/1.1" 200 9228 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
172.16.0.70 - - [03/Jan/2019:23:58:20 +0800] "GET / HTTP/1.1" 302 0 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
172.16.0.70 - - [03/Jan/2019:23:58:20 +0800] "GET /ljzx HTTP/1.1" 302 5 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"
...
3、統計
總PV量：
[root@localhost logs]# awk '{print $6}' host.access.log | wc -l
獨立IP：
[root@localhost logs]# awk '{print $1}' host.access.log | sort -r |uniq -c | wc -l
UV統計：
[root@localhost logs]# awk '{print $10}' host.access.log | sort -r |uniq -c |wc -l