quota—displays users' disk usage and limits

quota [ -guvv | q ]

quota [ -uvv | q ] user

quota [ -gvv | q ] group

quota displays users' disk usage and limits. By default, only the user quotas are printed.

-g	Prints group quotas for the group of which the user is a member.
-u	An optional flag, equivalent to the default.
-v	Displays quotas on file systems where no storage is allocated.
-q	Prints a more terse message, containing only information on filesystems where usage is over quota.