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Shell(grep)
source link: https://scncyangping.github.io/2022/06/04/shell05/
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Shell(grep)
Posted by YaPi on June 4, 2022- grep option pattern file1 fil2
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command grep option pattern
option
- -v 不显示匹配行信息
- -i 搜索时忽略大小写
- -n 显示行号
- -r 递归搜索
- -E 支持扩展正则表达式
- -F 不按正则表达式匹配，按照字符串字面意思匹配
- -c 只显示匹配总行数
- -w 匹配整词
- -x 匹配整行
- -l 只显示文件名，不显示内容
- -s 不显示错误信息
egrep
- grep 默认不支持扩展正则表达式，只支持基础正则表达式
- 使用grep -E可以支持扩展正则表达式
- 使用egrep可以扩展正则表达式，与grep -E等价
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