Last year August, I installed Knoppix on my HDD. Great! Disk size is 2.8 GB, and was about 70% full (if I remember it correctly).

All this time, I used it as a local web server with the webroot on the hda6 partition. I put my php files on this partition. Free space: 6GB on an 8 GB hdd.

It was great, until hda1 went full this week! Less than a few K free space! Of course, sessions can't be written anymore, etc. How could this happen? I installed nothing after the initial install! BTW, the tmp dir is quite tidy.

My question is: what kind of files could have been written on the hdd? And how do I clean up the disk, 'cause I cannot detect anything strange on the hdd. PROC is large as well, how do I purge this? And how can I prevent this for the future?

TIA,
Royston