Quota support for various file systems is implemented using the generic code provided by the Linux kernel. However, VxFS does not use this generic interface. VxFS instead supports a similar set of commands that work only for VxFS file systems.
VxFS supports the following quota-related commands:
In addition to these commands, the VxFS mount command supports a special mount option (-o quota|userquota|groupquota), which can be used to turn on quotas at mount time. You can also selectively enable or disable user or group quotas on a VxFS file system during remount or on a mounted file system.
For additional information on the quota commands, see the corresponding manual pages.