There are gazillions of questions and answers regarding how to rename files.
I'm new to Linux and this myriad of possible ways and different results and different configurations confuses me.

For example:

• rename works, but not recursively


• grep works recursively, but can't be used to search for file and directory names, instead of file contents


• find works, but has a long ugly syntax when you want to search using regular expressions.

And also a lot of answers on ask ubuntu and stackoverflow do not work for me and I don't know how to debug and troubleshoot them.

So, forgive me to ask it one more time.

I'm searching for a clean, memorizable way of:

Renaming files recursively using simple regular expression.

I already do it for the content of files using this syntax:

grep -rl search_regex | xargs sed -i 's/old/new/g'

It works without a lot of frustration. It works out of the box. It just works. I'm searching for a workable solution that is neat and clean. Can you help me please?