1、概念：
- UV(Unique Visitor)：独立访客，将每个独立上网电脑（以cookie为依据）视为一位访客，一天之内（00:00-24:00），访问您网站的访客数量。一天之内相同cookie的访问只被计算1次；
- PV（Page View）：访问量,即页面浏览量或者点击量,用户每次对网站的访问均被记录1次。用户对同一页面的多次访问，访问量值累计；
- 统计独立IP：00:00-24:00内相同IP地址只被计算一次,做网站优化的朋友最关心这个；
2、日志输出格式：
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、统计
总PV量：
[root@localhost logs]# awk '{print $6}' host.access.log | wc -l
独立IP：
[root@localhost logs]# awk '{print $1}' host.access.log | sort -r |uniq -c | wc -l
UV统计：
[root@localhost logs]# awk '{print $10}' host.access.log | sort -r |uniq -c |wc -l