This document describes how to enable file system quota on a Linux host, assigning quota for users and groups, as well as the usage of miscellaneous quota commands. Users run ning older kernels may need to upgrade to a newer kernel version in order to take advantage of quota. I appreciate it. The idea behind quota is that users are forced to stay under their disk comsumption limit, taking away their ability to comsume unlimited disk space on a system.
Quota is handled on a per user, per file system basis.
If there is more than one file system which a user is expected to create files, then quota must be set for each file system seperately. Current Status of Quota on Linux Quota support has been integrated into kernel since version 1.3.8x I heard. Now it is part of the 2.0 release of the Linux kernel. If your system doesn't support quota, I really recommend an upgrade. Currently, quota works for ext2 type file system only.