How to replace text in files?

Wondering how you can replace text content in every file using regex?

Just create and alias using your shell. Im my case it will be fish alias:

Add to your ~/.config/fish/config.fish this line:

alias replace "perl -p -i -e $argv"

and here you go!

~ $ replace 's/hello/goobye/g' *.md

BTW! Hope you have perl installed. I have ;)