disk usage

Hi
If the disk space is running low in the home directories,
and I cannot add more disk space at the moment.

How can I determine who is using the most disk space?

Assuming your "who" is users, and your users home directories reside in /usr/home, you could do:

du -ch /usr/home/* | less 

thanks glen.
One user on this system is using a lot more disk space than any other user. How shall I deal
with this.

My suggestion? Quotas.

yes glen