I have two directories that look something like the following but with many more files.
folder1/pic1.png folder1/test/readme.txt folder2/guest.html folder2/backup/notes.txt
I want to "merge" these two so all the contents of folder2 end up in folder1 and folder2 gets removed. They are on the same filesystem and disk (ext4). I know all of the files are unique, would mv work fine here?