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This discussion was converted from issue #36 on August 14, 2022 06:04.
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这个就需要grep的ABC选项了。每个选项后面都跟数字,表示的是行数。
也就是说C包含了AB的功能,比如:
查询a.txt中xxx出现的位置以及它所在行的前后5行
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