cat bbs.access.2014-05-01.log  | awk ‘{print $1}‘ | sort -n  | uniq -c | sort -n | tac | head -n 10

cat bbs.access.2014-05-01.log  | awk ‘{print $1}‘ | sort -n  | uniq -c | sort -n | tail -n 10 

cat bbs.access.2014-05-01.log  | awk ‘{print $9}‘ | sort -n | uniq -c

[root@mode ~]# awk ‘{print $1}‘  access_2010-12-8.log| sort -n  | uniq -c |sort -nr -k1

      9 59.33.26.105

      8 124.115.4.18

      3 123.122.65.226

[root@mode ~]# awk ‘{print $1}‘  access_2010-12-8.log| sort -n  | uniq -c |sort -n|tac

      9 59.33.26.105

      8 124.115.4.18

      3 123.122.65.226

NAME

       tac - concatenate and print files in reverse    #在反向连接和打印文件

-r, --regex

              interpret the separator as a regular expression  #解释分离器作为一个正则表达式 

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简单实现取访问日志的IP