如何过滤linux中的搜索答案

【问题标题】：how can I filter the search in linux如何过滤linux中的搜索
【发布时间】：2016-04-14 02:18:17
【问题描述】：

我有一个看起来像这样的数据文件：有时其中一些以“key M###”（### 代表任何数字）开头，我如何过滤我的搜索，以便只有那些包含“ M”会出现？？

> dip binary_data_file.df | tail
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key M701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key M701, datafile binary_data_file.df, prt 0000000

【问题讨论】：

标签： linux search filter

【解决方案1】：

您可以将数据传递给grep 进行过滤。像下面这样-

            cat datafile.txt | grep "M[0-9]*"|less

【讨论】：

【解决方案2】：

file.txt：

key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key M701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key K701, datafile binary_data_file.df, prt 0000000
key M701, datafile binary_data_file.df, prt 0000000

使用grep:

$ grep -E 'M[0-9]{3}' file.txt

或使用egrep:

$ egrep 'M[0-9]{3}' file.txt

输出：

key M701, datafile binary_data_file.df, prt 0000000
key M701, datafile binary_data_file.df, prt 0000000

【讨论】：