I have the following text:
A Hello world B Hello world C Hello world
I know that I can replace
sed 's/Hello/Hi/g' -i test
but this replace each
A Hi world B Hi world C Hi world
what I really want is to replace only the
A Hello world B Hi world C Hello world
so I have tried this:
sed 's/"B\nHello"/"B\nHi"/g' -i test
but nothing happened, How can I do this?
Note: There are some white-spaces on the beginning of each line of the file.