[tlug] Something is eating my disk space

[Dave M G <martin@example.com>]

TLUG,

On my web hosting service, I have about a gig of space for storage. 
Ordinarily, I have nowhere near that much data in my web sites as I 
don't keep a lot of multimedia there. At most, it's maybe one or two 
hundred megabytes.

But recently I saw an error on one of my web sites that says "disk quota 
exceeded". I logged into the web interface for the system control panel 
and it says that I have about 1.1 gigs of data stored.

I haven't uploaded anything that could account for this overflow of 
stored data. I suspect it's something like a default mail account 
soaking up spam, or maybe some kind of log file that's being appended to 
constantly. But, despite my attempts to hunt around both the web 
interface for the control panel and also within directories for the 
command line, and I can't see anything big enough to be a problem.

Are there some commands I could run at the prompt that could help me 
locate files or directories that are over a certain size?

Does anyone have any tips as to what might be the culprit?

Thanks for any advice.

--
Dave M G