How do I replace text in multiple files?

Remove all the files you don’t want to edit by selecting them and pressing DEL, then right-click the remaining files and choose Open all. Now go to Search > Replace or press CTRL+H, which will launch the Replace menu. Here you’ll find an option to Replace All in All Opened Documents.

How can I edit multiple files in Linux?

Linux comes with a very powerful built-in tool called rename. The rename command is used to rename multiple or group of files, rename files to lowercase, rename files to uppercase and overwrite files using perl expressions.