You can set up user and group quotas using the vxedquota command. You must have superuser privileges to edit quotas.
vxedquota creates a temporary file for the given user; this file contains on-disk quotas for each mounted file system that has a quotas file. It is not necessary that quotas be turned on for vxedquota to work. However, the quota limits are applicable only after quotas are turned on for a given file system.
To edit quotas
# vxedquota [-u] username
Editing the quotas of one or more users is the default behavior if the -u option is not specified.
# vxedquota -g groupname