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QUOTACHECK(8) System Manager's Manual QUOTACHECK(8)


quotacheckfile system quota consistency checker


quotacheck [-guv] [-l maxrun] -a

quotacheck [-guv] filesystem ...


The quotacheck utility examines each file system, builds a table of current disk usage, and compares this table against that recorded in the disk quota file for the file system. If any inconsistencies are detected, both the quota file and the current system copy of the incorrect quotas are updated (the latter only occurs if an active file system is checked). By default both user and group quotas are checked.

The following options are available:

If supplied in place of any file system names, quotacheck will check all the file systems indicated in /etc/fstab to be read-write with disk quotas. By default only the types of quotas listed in /etc/fstab are checked.
Only group quotas listed in /etc/fstab are to be checked.
Specifies the maximum number of concurrent file systems to check in parallel. If this option is omitted, or if maxrun is zero, parallel passes are run as per fsck(8). This option is deprecated and parallel passes are always run as per fsck(8).
Only user quotas listed in /etc/fstab are to be checked.
Report discrepancies between the calculated and recorded disk quotas and other additional diagnostic messages.

Specifying both -g and -u is equivalent to the default. Parallel passes are run on the file systems required, using the pass numbers in /etc/fstab in an identical fashion to fsck(8).

Normally, quotacheck operates silently.

The quotacheck utility expects each file system to be checked to have a quota files named quota.user and which are located at the root of the associated file system. These defaults may be overridden in /etc/fstab. If a file is not present, quotacheck will create it. These files should be edited with the edquota(8) utility.

The quotacheck utility is normally run at boot time from the /etc/rc file. The rc startup procedure is controlled by the /etc/rc.conf variable check_quotas. Note that to enable this functionality in /etc/rc you also need to enable startup quota procedures with the variable enable_quotas in /etc/rc.conf. The kernel must also be built with options QUOTA.

The quotacheck utility accesses the raw device in calculating the actual disk usage for each user. Thus, the file systems checked should be quiescent while quotacheck is running.


at the file system root with user quotas
at the file system root with group quotas
default file systems


quota(1), quotactl(2), fstab(5), rc.conf(5), edquota(8), fsck(8), quotaon(8), repquota(8)


The quotacheck utility appeared in 4.2BSD.


The quota system will ignore UIDs or GIDs that would be negative when evaluated as a signed value. Typically those types of ids can appear in the file system from NFS mounts or archive files from other operating systems. Extremely large UIDs or GIDs will cause quotacheck to run for an unreasonable amount of time and also produce extremely large quota data files.

January 25, 2007 Debian