How to add/change entries use diff and sed

[tiffany C]

Hi,

I am new on linux bash script. I am asking to do a "diff" on 2 files and then add/change file1 based on the comparsion with file2. I knew I have to use "diff" and "sed" to do it, but I have no idea how to put them together. Anybody has any idea? What is the regular expression should i use for sed.

Thanks,
Tiffany

[cfajohnson]

Originally Posted by tiffany C

I am new on linux bash script. I am asking to do a "diff" on 2 files and then add/change file1 based on the comparsion with file2. I knew I have to use "diff" and "sed" to do it, but I have no idea how to put them together. Anybody has any idea? What is the regular expression should i use for sed.

Use patch, not sed.

However, if you just want file1 to be the same as file2, why not copy file2 to file1?