quota-tools

To really activate quotas, you’ll need to add usrquota to the appropriate partitions as listed in /etc/fstab. Here’s an example:

/dev/hda2   /home   ext2   defaults,usrquota    1   1

When you want quota support for a given partition, some special files have to be created boot-time. This is not done by default. To do so, you need to

# touch /var/lib/quota/new

then, reboot to create those files.

To edit user quotas, use edquota. See man edquota.