I have used
cp -rl to copy a folder. When measuring the size of the source and of the result of the copy
du -sl returns slightly different sizes, even though
diff confirms that their content are identical:
$ cp -rl folderA/ folderB/ $ du -sl folderA folderB 98561224 folderA 98590512 folderB $ diff --brief -ra folderA/ folderB/ $
Both folders reside on the same hard drive, no modifications to any of them have been done between the copy and the measure. I found nothing in the documentation of
cp which could explain the difference.