假设 Nginx 的日志存储在 nowcoder.txt 里，内容如下： 192.168.1.20 - - [21Apr2020:14:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.21 - - [21Apr2020:15:27:49 +0800] "GET 2index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [21Apr2020:21:27:49 +0800] "GET 3index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.23 - - [21Apr2020:22:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.24 - - [22Apr2020:15:27:49 +0800] "GET 2index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.25 - - [22Apr2020:15:26:49 +0800] "GET 3index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.20 - - [23Apr2020:08:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.21 - - [23Apr2020:09:20:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [23Apr2020:10:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [23Apr2020:10:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.20 - - [23Apr2020:14:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.21 - - [23Apr2020:15:27:49 +0800] "GET 2index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [23Apr2020:15:27:49 +0800] "GET 3index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.25 - - [23Apr2020:16:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.24 - - [23Apr2020:20:27:49 +0800] "GET 2index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.25 - - [23Apr2020:20:27:49 +0800] "GET 3index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.20 - - [23Apr2020:20:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.21 - - [23Apr2020:20:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [23Apr2020:20:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.22 - - [23Apr2020:15:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 192.168.1.21 - - [23Apr2020:20:27:49 +0800] "GET 1index.php HTTP1.1" 404 490 "-" "Mozilla5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko20100101 Firefox45.0" 现在需要编写 Shell 脚本统计出 2020 年 4 月 23 号访问 IP 的对应次数，并且按照次数降序排序。你的脚本应该输出： 5 192.168.1.22 4 192.168.1.21 3 192.168.1.20 2 192.168.1.25 1 192.168.1.24
输入描述:
1
输出描述:
2
示例1
输入
192.168.1.20 - - [21/Apr/2020:14:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.21 - - [21/Apr/2020:15:27:49 +0800] "GET /2/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [21/Apr/2020:21:27:49 +0800] "GET /3/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.23 - - [21/Apr/2020:22:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.24 - - [22/Apr/2020:15:27:49 +0800] "GET /2/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.25 - - [22/Apr/2020:15:26:49 +0800] "GET /3/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.20 - - [23/Apr/2020:08:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.21 - - [23/Apr/2020:09:20:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [23/Apr/2020:10:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [23/Apr/2020:10:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.20 - - [23/Apr/2020:14:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.21 - - [23/Apr/2020:15:27:49 +0800] "GET /2/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [23/Apr/2020:15:27:49 +0800] "GET /3/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.25 - - [23/Apr/2020:16:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.24 - - [23/Apr/2020:20:27:49 +0800] "GET /2/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.25 - - [23/Apr/2020:20:27:49 +0800] "GET /3/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.20 - - [23/Apr/2020:20:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.21 - - [23/Apr/2020:20:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [23/Apr/2020:20:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.22 - - [23/Apr/2020:15:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.1.21 - - [23/Apr/2020:20:27:49 +0800] "GET /1/index.php HTTP/1.1" 404 490 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0"
输出
5 192.168.1.22
4 192.168.1.21
3 192.168.1.20
2 192.168.1.25
1 192.168.1.24
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