shell - CPANEL Terminal add 2 x lines of text at start of a document

Question

I am a little new to all this but have been playing around.

I have a CPANEL Server and need to add some text to a specific file. Its 2 x lines of text and needs to be added to the start of the file.

I have managed to do this with the sed -i method but two things i cant do ;

1. Add it to the start and not replacing something
2. I actually need to scan the main directory, sub directories and sub sub directories for many files all the same name. Then i need to add it to each of these files. Each folder (there is about 100) has the same file i need editing in, and some sub sub folders also have it.

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So to clarify, if anyone can help ;

1. I need to add 2 x lines of text to the start of a file 'thisfile.txt'
2. I need to add a space under this inserted text, before the original text continues
3. There is multiple files in many places in many directories. I need to target them all in the same way.
4. There is Sub directories and sub sub directories
5. I am using a Cpanel server with terminal

Thanks in advance. Looking forward to help and playing around with this.

Apologies for quite a few tags. Not 100% sure who to be aiming at. Im new here.

question from:https://stackoverflow.com/questions/65869568/cpanel-terminal-add-2-x-lines-of-text-at-start-of-a-document

Answer 1

Waitting for answers