bash - 存在字符串时如何在两个定界符之间提取文本

Question

我有一个大数据文件，如下所示:

//
ID   1.1.1.258
DE   6-hydroxyhexanoate dehydrogenase.
CA   6-hydroxyhexanoate + NAD(+) = 6-oxohexanoate + NADH.
CC   -!- Involved in the cyclohexanol degradation pathway in Acinetobacter
CC       NCIB 9871.
//
ID   1.1.1.259
DE   3-hydroxypimeloyl-CoA dehydrogenase.
CA   3-hydroxypimeloyl-CoA + NAD(+) = 3-oxopimeloyl-CoA + NADH.
CC   -!- Involved in the anaerobic pathway of benzoate degradation in
CC       bacteria.
//
ID   1.1.1.260
DE   Sulcatone reductase.
CA   Sulcatol + NAD(+) = sulcatone + NADH.
CC   -!- Studies on the effects of growth-stage and nutrient supply on the
CC       stereochemistry of sulcatone reduction in Clostridia pasteurianum,
CC       C.tyrobutyricum and Lactobacillus brevis suggest that there may be at
CC       least two sulcatone reductases with different stereospecificities.
//

我想提取此文件中包含作品 anaerobic 的部分。我特别想要 ID 行。

有没有办法在 ID 和//之间搜索文件以找到 anaerobic 并将输出打印到新文件？如果打印了整个部分，那很好，我可以在之后将其 grep 出来。

预期的结果应该是

ID   1.1.1.259

或

ID   1.1.1.259
DE   3-hydroxypimeloyl-CoA dehydrogenase.
CA   3-hydroxypimeloyl-CoA + NAD(+) = 3-oxopimeloyl-CoA + NADH.
CC   -!- Involved in the anaerobic pathway of benzoate degradation in
CC       bacteria.
//

Answer 1

用awk很简单

awk '/anaerobic/' RS='//\n' ORS='\n//' ./file.txt