参数:
- -i: 不区分大小写
- -c: 统计包含匹配的行数
- -n: 输出行号
- -v: 反向匹配
示例文件: (example.txt)
The cat‘s name is Tom, what‘s the mouse‘s name?
The mouse‘s NAME is Jerry
They are good friends
1、找出包含name
的行
# 等价于 cat example.txt | grep ‘name‘
grep ‘name‘ example.txt
# 输出
The cat‘s name is Tom, what‘s the mouse‘s name?
默认grep搜索是区分大小写的,所以搜索name时只搜索到name所在的第一行,第二行大写的NAMW没有匹配到。
2、忽略搜索内容大小写
# 等价于 cat example.txt | grep -i ‘name‘
grep -i ‘name‘ example.txt
# 输出
The cat‘s name is Tom, what‘s the mouse‘s name?
The mouse‘s NAME is Jerry
3、统计搜索内容行数
# 等价于 cat example.txt | grep -c ‘name‘
grep -c ‘name‘ example.txt
# 输出
1
# 等价于 cat example.txt | grep -ci ‘name‘
grep -ci ‘name‘ example.txt
# 输出
2
4、搜索除指定字符所在行的其他内容
# 等价于 cat example.txt | grep -v ‘name‘
grep -v ‘name‘ example.txt
# 输出
The mouse‘s NAME is Jerry
They are good friends