learninglinux12345's questions

我想在文件中查找一个字符串：

例子

https://google.com/first/second/45683

我想重写它并保留原来的行：

https://google.com/first/second/45683
https://yahoo.com/third/fourth/45683

我尝试过几次

sed -r 's@https://google.com/first/second/([a-Z0-9]+)@yahoo.com/third/fourth/\1@' 文件.txt

输出：

yahoo.com/third/fourth/45683

它进行了重写，但没有保留原始行。

另一次尝试

sed -r 'a\s@https://google.com/first/second/([a-Z0-9]+)@yahoo.com/third/fourth/\1@' 文件.txt

输出：

https://google.com/first/second/45683
https://google.com/first/second/([a-Z0-9]+)@yahoo.com/third/fourth/1@

它附加两行但不会重写第二行。