How to manage quotas

NOTE: The XFS file system doesn't seem to support quotas.

Setup for a partition mounted at /:

touch /aquota.user
chmod 600 /aquota.user
edit /etc/fstab, add ",usrquota" after the word "defaults" in the affected partition.
reboot
quotacheck -vm /
quotaon -v /

To setup quotas for a certain user:

setquota <user> <soft-limit> <hard-limit> 0 0 <mount-point>

Example: to set a soft-limit of 10MB, hard-limit of 12MB, for sccmarti whose home directory /home/sccmarti lives under the / mount point:

setquota sccmarti 10240 12288 0 0 /

To edit quotas (using editor specified in $EDITOR, or vi):

edquota <user>

To view quotas for a specific user:

quota <user>

To update quota files

quotacheck -vfm /

To see a report on quota usage

repquota -a

Troubleshooting

If repquota shows much more used space than you can account for, check /root/.cpan/build for perl modules that don't belong to root.