quota(1) - phpMan

btrfs-qgroup (8)     - control the quota group of a btrfs filesystem
btrfs-quota (8)      - control the global quota status of a btrfs filesystem
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