解析文件以计算发生的天数

Question

我有以下输入文件（称之为log）。

2012-02-10 11:00:44.211 connection closed_to host
2012-02-10 11:00:44.598 connection closed_to host
2012-02-10 11:00:45.510 connection closed_to host
2012-02-10 11:00:45.891 connection closed_to host
2012-02-10 11:00:46.111 connection closed_to host

我希望能够计算每分钟的行数。例如，我想获得以下输出：

2012-02-10 11:00 connection closed to host 5

Answer 1

您的输入文件在11:00而不是4时有5个匹配，11:01没有匹配但忽略了：

awk -F'[: ]' '{a[$1" "$2":"$3" "$5" "$6" "$7]++}END{for(k in a)print k,a[k]}' log
2012-02-10 11:00 connection closed_to host 5