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quotacheck(8)									    quotacheck(8)

       quotacheck - scan a filesystem for disk usage, create, check and repair quota files

       quotacheck [ -gubcfinvdMmR ] [ -F quota-format ] -a | filesystem

       quotacheck  examines  each  filesystem, builds a table of current disk usage, and compares
       this table against that recorded in the disk quota file for the filesystem (this  step  is
       ommitted  if  option -c is specified). 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 filesystem is checked which is not advised).  By default, only user
       quotas are checked.  quotacheck expects each filesystem to be checked to have quota  files
       named  [a]quota.user  and [a]quota.group located at the root of the associated filesystem.
       If a file is not present, quotacheck will create it.

       If the quota file is corrupted, quotacheck tries to save as much data as possible.  Rescu-
       ing  data  may  need  user intervention. With no additional options quotacheck will simply
       exit in such a situation. When in interactive mode (option -i) , the  user  is  asked  for
       advice.	Advice	can  also be provided from command line (see option -n) , which is useful
       when quotacheck is run automatically (ie. from script) and failure is unacceptable.

       quotacheck should be run each time the system  boots  and  mounts  non-valid  filesystems.
       This is most likely to happen after a system crash.

       It is strongly recommended to run quotacheck with quotas turned off on for the filesystem.
       Otherwise, possible damage or loss to data in the quota files  can  result.   It  is  also
       unwise  to run quotacheck on a live filesystem as actual usage may change during the scan.
       To prevent this, quotacheck tries to remount the filesystem read-only before starting  the
       scan.   After the scan is done it remounts the filesystem read-write. You can disable this
       with option -m.	You can also make quotacheck ignore the failure to remount the filesystem
       read-only with option -M.

       -b     Forces quotacheck to make backups of the quota file before writing the new data.

       -v     quotacheck reports its operation as it progresses.  Normally it operates silently.

       -d     Enable debugging mode.  It will result in a lot of information which can be used in
	      debugging the program. The output is very verbose and the scan will be slow.

       -u     Only user quotas listed in /etc/mtab or on the  filesystems  specified  are  to  be
	      checked.	This is the default action.

       -g     Only  group  quotas  listed  in /etc/mtab or on the filesystems specified are to be

       -c     Don't read existing quota files. Just perform a new scan and save it to disk.  quo-
	      tacheck also skips scanning of old quota files when they are not found.

       -f     Forces  checking of filesystems with quotas enabled. This is not recommended as the
	      created quota files may be out of sync.

       -M     This flag forces checking of filesystem in read-write mode if a remount  fails.  Do
	      this only when you are sure no process will write to a filesystem while scanning.

       -m     Don't try to remount filesystem read-only. See comment with option -M.

       -i     Interactive  mode.  By default quotacheck exits when it finds an error. In interac-
	      tive mode user is asked for input instead.  See option -n.

       -n     If the quota files become corrupted, it is possible for  duplicate  entries  for	a
	      single  user or group ID to exist.  Normally in this case, quotacheck exits or asks
	      user for input. When this option is set, the first entry found is always used (this
	      option works in interactive mode too).

       -F format-name
	      Check quota for specified format (ie. don't perform format auto-detection). This is
	      recommended as detection might not work well on corrupted  quota	files.	 Possible
	      format  names  are:  vfsold  (version 1 quota), vfsv0 (version 2 quota), rpc (quota
	      over NFS), xfs (quota on XFS filesystem)

       -a     Check all mounted non-NFS filesystems in /etc/mtab

       -R     When used together with the -a option, all filesystems except for the root filesys-
	      tem are checked for quotas.

       quotacheck  should  only  be  run  by  super-user. Non-privileged users are presumably not
       allowed to read all the directories on the given filesystem.

       quota(1), quotactl(2), fstab(5), quotaon(8),  repquota(8),  convertquota(8),  setquota(8),
       edquota(8), fsck(8), efsck(8), e2fsck(8), xfsck(8)

       aquota.user or aquota.group
		      located  at  filesystem root with quotas (version 2 quota, non-XFS filesys-
       quota.user or quota.group
		      located at filesystem root with quotas (version 1 quota,	non-XFS  filesys-
       /etc/mtab      names and locations of mounted filesystems
       Jan Kara <jack@suse.cz>
       Based on old quotacheck by:
       Edvard Tuinder <ed@elm.net>
       Marco van Wieringen <mvw@planets.elm.net>

					 Fri Jul 20 2001			    quotacheck(8)
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