使用“|"进行搜索替代运算符 [英] grepping using the "|" alternative operator

问题描述

以下是一个名为 AT5G60410.gff 的大文件示例:

The following is a sample of a large file named AT5G60410.gff:

Chr5    TAIR10  gene    24294890    24301147    .   +   .   ID=AT5G60410;Note=protein_coding_gene;Name=AT5G60410
Chr5    TAIR10  mRNA    24294890    24301147    .   +   .   ID=AT5G60410.1;Parent=AT5G60410;Name=AT5G60410.1;Index=1
Chr5    TAIR10  protein 24295226    24300671    .   +   .   ID=AT5G60410.1-Protein;Name=AT5G60410.1;Derives_from=AT5G60410.1
Chr5    TAIR10  exon    24294890    24295035    .   +   .   Parent=AT5G60410.1
Chr5    TAIR10  five_prime_UTR  24294890    24295035    .   +   .   Parent=AT5G60410.1
Chr5    TAIR10  exon    24295134    24295249    .   +   .   Parent=AT5G60410.1
Chr5    TAIR10  five_prime_UTR  24295134    24295225    .   +   .   Parent=AT5G60410.1
Chr5    TAIR10  CDS 24295226    24295249    .   +   0   Parent=AT5G60410.1,AT5G60410.1-Protein;
Chr5    TAIR10  exon    24295518    24295598    .   +   .   Parent=AT5G60410.1

我在使用 grep 从中提取特定行时遇到了一些问题.我想提取第三列中指定的基因"类型或外显子"类型的所有行.当这不起作用时，我感到很惊讶:

I am having some trouble extracting specific lines from this using grep. I wanted to extract all lines that are of type "gene" or type "exon", specified in the third column. I was suprised when this did not work:

grep 'gene|exon' AT5G60410.gff

没有返回结果.我哪里做错了?

No results are returned. Where have I gone wrong?

推荐答案

您需要转义 |.以下应该可以完成这项工作.

You need to escape the |. The following should do the job.

grep "gene|exon" AT5G60410.gff

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