Science Fair Project Encyclopedia
du counts the disk space by walking the directory tree. As such, the amount of space on a file system shown by
du may vary from that shown by
df if files have been deleted but their blocks not yet freed.
du utility may first have appeared in version 3 of AT&T UNIX .
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details