I have a big but well formatted file 'A'. The first column stores the name of each row. I have another file 'B' stores the names which I am interested in. How can I select the rows having a name in file 'B'? This is simple in idea, but I am unfamiliar with LINUX.I have a big but well formatted file 'A'. The f
阅读背景：
仅选择文件中具有行名称的行
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