搜索包含两个0的字符串的行,如下所示:
grep -n 'o{2}' README.md
21:Choose one of the following options:
47:* An optimized version of the Google Universal Analytics snippet.
73:Take a look at the [documentation table of contents](dist/doc/TOC.md).
参数说明
- grep 查询命令你
- n
- 'o{2}'
- README.md 这是要查询的文本文件