quotacheck

The quotacheck command line tool is used in Unix-like operating systems to check and repair filesystem quota files. It ensures that the disk quotas for users and groups are correctly maintained. It scans the designated filesystems and compares the actual disk usage with the quota limits set for each user or group. If there are inconsistencies or discrepancies, quotacheck reports them.

To run quotacheck, the user needs to have administrative privileges or root access. One can specify the filesystems to be checked as arguments or configure it to check all filesystems listed in /etc/fstab. quotacheck can be run manually, but it is often included in system startup scripts to regularly check quotas automatically.

If inconsistencies are found, quotacheck can fix them by updating the quota files to reflect the actual disk usage. It also provides options to exclude specific directories, display only the inconsistencies, or force a complete rescan. quotacheck uses other quota management tools, such as quotaon and quotaoff, to enable or disable quotas on particular filesystems. Overall, quotacheck is a valuable tool for maintaining accurate disk quotas on Unix-like systems.