Disk quotas let you set the maximum amount of disk space a particular user is allowed to have on your server. The disk space used by a user is the sum of all the file sizes owned by their user id.
Enabling Disk Quotas Via /etc/fstab
Disk quotas will only work if you have set a quota option in your /etc/fstab.
You need to have a usrquota and/or grpquota option on the file system on which you wish to use quotas. e.g. in /etc/fstab you would have something like:
/dev/ubd0 / ext3 defaults,noatime,usrquota,grpquota 1 0
The ubd0 bit may be something like ubd1, sda1, hda1 etc. Leave that part alone in your /etc/fstab. Just add the usrquota,grpquota part.
Setting Up Disk Quotas
# reload the mount points with the quota settings enabled
mount -o remount /#install quota (if not there alread)
apt-get install quota
# will set up the quota files
quotacheck -acguvm# -m is needed, else you may get:
# quotacheck: Cannot remount filesystem mounted on / read-only so counted values might not be right.
# Please stop all programs writing to filesystem or use -m flag to force checking.# -c is needed, else you may get an error like
# quotacheck: Can't find filesystem to check or filesystem not mounted with quota
# edquota: Quota file not found or has wrong format.
# quota: Quota file not found or has wrong format.# should happen on reboot (in /etc/rc.d/rc.sysinit)
Using Disk Quotas
Now if you run:
It will show how much disk space each user is using.
To assign a quota to a user (per http://www.tldp.org/HOWTO/Quota-4.html