howto's

Configuring the Quota System
Implemented within the kernel
Enabled on a per-filesystem basis
Individual policies for groups or users
Limit by the number of 1K-blocks or inodes
Implement both soft and hard limits
Initialization
Partition mount options: usrquota, grpquota
Initialize database: quotacheck -cugm /filesystem
Start or stop quotas: quotaon, quotaoff

Managing Quotas
Implementation
Edit quotas directly: edquota username
From a shell: setquota username 4096 5120 40 50 /foo
Define prototypical users: edquota -p user1 user2
Reporting
User inspection: quota
Quota overviews: repquota
Miscellaneous utilities: warnquota