Ok I have a linux (slackware 9.1) box that has an 18gb drive in it. Yesterday df -h reported 3.4 gb of used space. Last night I was trying to burn a cd with k3b and the app hung all night, this morning the cd wasn't burned and the app was frozen. I killed the app and tried to restart it only to get a disk full message. So I started digging. I du'ed all the folders on / and this is what I came up with.

/bin = 6mb
/boot = 3mb
/dev = 352kb
/etc = 39mb
/home = 216mb
/lib = 21mb
/lost+found = 16kb
/opt = 357mb
/proc = 525mb
/root = 48mb
/sbin = 8mb
/usr = 2.5gb
/tmp = 92kb

Ok by my elemetary math I say that is nowhere near 18gb! I also ran this... just to see if there were any huge files laying around.

find /* -size +1000000 -print

To find any files over 1gb. No hits.

Where the hell is my disk space or why is df -h displaying the wrong info? Can anyone help me figure out what happened to my disk space?

Did you check /tmp?

yup 92kb sorry that was omitted in my original post, I'll add it.

What is the output of df -h

I got it fixed. Thanks for the replies.

Here's what I did.

touch /etc/forcefsck && reboot

When it was done rebooting everything was back in order.

root@slacky:/etc# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda2 18G 3.2G 14G 19% /