quota(8) - phpMan

doveadm-quota (1)    - Initialize/recalculate or show current quota usage
ftpquota (1)         - Perl script for managing limit/tally files for mod_quo...
quotactl (2)         - manipulate disk quotas
systemd-quotacheck (8) - File system quota checker logic
systemd-quotacheck.service (8) - File system quota checker logic
xfs_quota (8)        - manage use of quota on XFS filesystems